diff --git a/.github/workflows/PR.yml b/.github/workflows/PR.yml
index 10f942ec..54b7d6b2 100644
--- a/.github/workflows/PR.yml
+++ b/.github/workflows/PR.yml
@@ -15,27 +15,31 @@ jobs:
                       const { owner, repo, number: issue_number } = context.issue;
                       const pr = await github.rest.pulls.get({ owner, repo, pull_number: issue_number });
                       const title = pr.data.title;
-                      const labRegex = /\[LAB(\d+)\]/;
-                      const titleRegex = /^\[LAB\d+\] [\da-zA-Z]+$/;
 
-                      if (!titleRegex.test(title)) {
-                        core.setFailed('PR title does not match the required format. Please use the format [LAB#] student#.');
+                      const titleRegex = /^\[LAB(\d+)\] [a-zA-Z]?\d+$/;
+                      const match = title.match(titleRegex);
+
+                      let labNumberStr = undefined;
+                      if (match) {
+                        labNumberStr = match[1];
+                      } else {
+                        core.setFailed('PR title does not match the required format. Please use the format: [LAB#] <studentId>.');
                       }
 
-                      if (pr.data.head.ref !== pr.data.base.ref) {
-                        core.setFailed('The source branch and target branch must be the same.');
+                      const labelToAdd = `lab${labNumberStr}`;
+                      if (labNumberStr) {
+                        await github.rest.issues.addLabels({ owner, repo, issue_number, labels: [labelToAdd] });
                       }
 
                       if (pr.data.base.ref === 'main') {
                         core.setFailed('The target branch cannot be main.');
                       }
 
-                      const match = title.match(labRegex);
-                      if (match) {
-                        const labelToAdd = 'lab' + match[1];
-                        await github.rest.issues.addLabels({ owner, repo, issue_number, labels: [labelToAdd] });
-                      } else {
-                        core.setFailed('No match found in PR title. Please add a label in the format [LAB#] to the PR title.');
+                      if (labNumberStr < 3 && pr.data.head.ref !== pr.data.base.ref) {
+                        core.setFailed('The source branch and target branch must be the same.');
+                      }
+                      if (labNumberStr >= 3 && pr.data.head.ref !== labelToAdd) {
+                        core.setFailed(`The source branch must be '${labelToAdd}'`);
                       }
     checklist-check:
         runs-on: ubuntu-latest
@@ -49,12 +53,12 @@ jobs:
                       const pr = await github.rest.pulls.get({ owner, repo, pull_number: issue_number });
                       const body = pr.data.body;
 
-                      const checkboxes = body.match(/\- \[[x ]\]/g);
+                      const checkboxes = body.match(/^ ?(-|\*) \[[x ]\]/gmi);
                       if (!checkboxes || checkboxes.length !== 5) {
                         core.setFailed('The PR description must contain exactly 5 checkboxes.');
                       }
 
-                      const unchecked = body.match(/\- \[ \]/g);
+                      const unchecked = body.match(/^ ?(-|\*) \[ \]/gm);
                       if (unchecked && unchecked.length > 0) {
-                        core.setFailed(`There are ${unchecked.length} unchecked items in the PR description.`);
+                        core.setFailed(`There are ${unchecked.length} unchecked item(s) in the PR description.`);
                       }
diff --git a/.github/workflows/lab-autograding.yml b/.github/workflows/lab-autograding.yml
new file mode 100644
index 00000000..ba7a31f9
--- /dev/null
+++ b/.github/workflows/lab-autograding.yml
@@ -0,0 +1,56 @@
+name: Autograding
+
+on:
+    pull_request_target:
+        types: [labeled, synchronize, opened, reopened, ready_for_review]
+
+jobs:
+    build:
+        runs-on: ${{ matrix.os }}
+        strategy:
+            matrix:
+                os: [ubuntu-22.04]
+            fail-fast: false
+        steps:
+            - uses: actions/checkout@v4
+              with:
+                  ref: "${{ github.event.pull_request.merge_commit_sha }}"
+                  fetch-depth: 1
+            - uses: actions/setup-node@v4
+              with:
+                  node-version: latest
+            - name: Extract lab number and Check no changes other than specific files
+              uses: actions/github-script@v5
+              id: lab
+              with:
+                  result-encoding: string
+                  github-token: ${{ secrets.GITHUB_TOKEN }}
+                  script: |
+                      const { owner, repo, number: issue_number } = context.issue;
+                      const pr = await github.rest.pulls.get({ owner, repo, pull_number: issue_number });
+                      const labels = pr.data.labels;
+                      const lab = labels.find((label) => label.name.startsWith('lab'));
+                      if (!lab) {
+                        core.setFailed('No lab label found on the PR.');
+                        return { number: 0 };
+                      }
+                      const labNumberMatch = lab.name.match(/lab(\d+)/);
+                      if (!labNumberMatch) {
+                        core.setFailed('Invalid lab label found on the PR.');
+                        return { number: 0 };
+                      }
+                      const labNumber = labNumberMatch[1];
+                      console.log(`Lab number: ${labNumber}`)
+
+                      const files = await github.rest.pulls.listFiles({ owner, repo, pull_number: issue_number });
+                      const changedFiles = files.data.map((file) => file.filename);
+                      const allowedFileRegex = /^lab\d+\/main_test.js$/;
+                      const specialChangedFiles = ["lab5/Answer.md", "lab5/antiasan.c", "lab6/Answer.md", "lab7/sol.py"];
+                      if (!changedFiles.every((file) => (allowedFileRegex.test(file) || specialChangedFiles.includes(file)))) {
+                        core.setFailed('The PR contains changes to files other than the allowed files.');
+                      }
+                      return labNumber;
+            - name: Grading
+              run: |
+                  cd lab${{ steps.lab.outputs.result }}
+                  ./validate.sh
diff --git a/.github/workflows/lab1.yml b/.github/workflows/lab1.yml
deleted file mode 100644
index 49a5d578..00000000
--- a/.github/workflows/lab1.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-name: lab1 autograding
-
-on:
-    pull_request:
-        types: [labeled, synchronize, opened, reopened, ready_for_review]
-
-jobs:
-    build:
-        if: contains(github.event.pull_request.labels.*.name, 'lab1')
-        runs-on: ${{ matrix.os }}
-        strategy:
-            matrix:
-                os: [ubuntu-22.04]
-            fail-fast: false
-        steps:
-            - uses: actions/checkout@v1
-              with:
-                  fetch-depth: 1
-            - name: dependency (ubuntu)
-              run: |
-                  curl -fsSL https://deb.nodesource.com/setup_21.x | sudo -E bash - &&\
-                  sudo apt-get install -y nodejs
-            - name: grading
-              run: |
-                  cd lab1
-                  ./validate.sh
diff --git a/.github/workflows/lab2.yml b/.github/workflows/lab2.yml
deleted file mode 100644
index 2cb76fa7..00000000
--- a/.github/workflows/lab2.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-name: lab2 autograding
-
-on:
-    pull_request:
-        types: [labeled, synchronize, opened, reopened, ready_for_review]
-
-jobs:
-    build:
-        if: contains(github.event.pull_request.labels.*.name, 'lab2')
-        runs-on: ${{ matrix.os }}
-        strategy:
-            matrix:
-                os: [ubuntu-22.04]
-            fail-fast: false
-        steps:
-            - uses: actions/checkout@v1
-              with:
-                  fetch-depth: 1
-            - name: dependency (ubuntu)
-              run: |
-                  curl -fsSL https://deb.nodesource.com/setup_21.x | sudo -E bash - &&\
-                  sudo apt-get install -y nodejs
-            - name: grading
-              run: |
-                  cd lab2
-                  ./validate.sh
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..40b878db
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+node_modules/
\ No newline at end of file
diff --git a/lab1/main_test.js b/lab1/main_test.js
index 74a716b4..ec5e8865 100644
--- a/lab1/main_test.js
+++ b/lab1/main_test.js
@@ -3,21 +3,54 @@ const assert = require('assert');
 const { MyClass, Student } = require('./main');
 
 test("Test MyClass's addStudent", () => {
-    // TODO
-    throw new Error("Test not implemented");
+    
+    //case 1
+    const myclass = new MyClass();
+    assert.strictEqual(myclass.addStudent("for_test"), -1);
+
+    //case 2
+    const student = new Student();
+    assert.strictEqual(myclass.addStudent(student), 0);
+
 });
 
 test("Test MyClass's getStudentById", () => {
-    // TODO
-    throw new Error("Test not implemented");
+    
+    //case 1
+    const myclass = new MyClass();
+    assert.strictEqual(myclass.getStudentById(-1), null);
+
+    //case 2
+    assert.strictEqual(myclass.getStudentById(1),null);
+
+    //case 3
+    const student1 = new Student();
+    myclass.addStudent(student1);
+    assert.strictEqual(myclass.getStudentById(0),student1);
+
 });
 
 test("Test Student's setName", () => {
-    // TODO
-    throw new Error("Test not implemented");
+
+    const student = new Student();
+
+     //case 1
+    assert.strictEqual(student.setName(1), undefined);
+    
+     //case 2
+    assert.strictEqual(student.setName('Amy'), undefined);
+
 });
 
 test("Test Student's getName", () => {
-    // TODO
-    throw new Error("Test not implemented");
-});
\ No newline at end of file
+    
+    const student = new Student();
+
+    //case 1
+    assert.strictEqual(student.getName(),'');
+    
+    //case 2
+    student.setName('Amy');
+    assert.strictEqual(student.getName(),'Amy');
+
+});
diff --git a/lab2/main_test.js b/lab2/main_test.js
index 5034468e..57ce4ce7 100644
--- a/lab2/main_test.js
+++ b/lab2/main_test.js
@@ -1,6 +1,104 @@
 const test = require('node:test');
 const assert = require('assert');
+const fs = require('fs');
+
+test.mock.method(fs, "readFile", (path, encoding, callback) => {
+    callback(null, "Amy\nJack");
+});
+
+const names = ['Amy', 'Jack'];
 const { Application, MailSystem } = require('./main');
 
-// TODO: write your tests here
-// Remember to use Stub, Mock, and Spy when necessary
\ No newline at end of file
+test("Test MailSystem's write", () => {
+    
+    const mailSystem = new MailSystem();
+    assert.strictEqual(mailSystem.write(names[0]), 'Congrats, ' + names[0] + '!');
+
+});
+
+test("Test MailSystem's send", () => {
+    
+    const mailSystem = new MailSystem();
+
+    //case 1
+    test.mock.method(Math, "random", () => true);
+    for(let i = 0; i < names.length; i++) {
+        assert.strictEqual(mailSystem.send(names[i]), true);
+    }
+
+    //case 2
+    test.mock.method(Math, "random", () => false);
+    for(let i = 0; i < names.length; i++) {
+        assert.strictEqual(mailSystem.send(names[i]), false);
+    }
+    
+});
+
+test("Test Application's getNames", async () => {
+
+    const application = new Application();
+    application.people = names;
+    const [people, selected] = await application.getNames();
+    assert.deepStrictEqual(people, names);
+    assert.deepStrictEqual(selected, []);
+
+});
+
+test("Test Application's getRandomPerson", () => {
+
+    const application = new Application();
+    application.people = names;
+
+    for(let i = 0; i < names.length; i++) {
+        test.mock.method(Math, "floor", () => i);
+        assert.strictEqual(application.getRandomPerson(), names[i]);
+    }
+
+});
+
+test("Test Application's selectNextPerson", async () => {
+
+    const application = new Application();
+    application.people = names;
+
+    application.getRandomPerson = () => "Amy";
+    assert.strictEqual(application.selectNextPerson(),'Amy');
+    assert.deepStrictEqual(application.selected,["Amy"]);
+
+    let count = 1;
+    application.getRandomPerson = () => {
+        if (count % 2){
+            count++;
+            return "Amy";
+        }
+        return "Jack";
+    };
+    assert.strictEqual(application.selectNextPerson(),'Jack');
+    assert.deepStrictEqual(application.selected,["Amy","Jack"]);
+
+    assert.strictEqual(application.selectNextPerson(),null);
+
+});
+
+test("Test Application's notifySelected", () => {
+
+    const application = new Application();
+
+    application.mailSystem.write = test.mock.fn(application.mailSystem.write);
+    application.mailSystem.send = test.mock.fn(() => true);
+
+    application.selected = names;
+    application.notifySelected();
+
+
+    //check call arguments
+    assert.strictEqual(application.mailSystem.write.mock.calls[0].arguments[0], names[0]);
+    assert.strictEqual(application.mailSystem.send.mock.calls[0].arguments[0], names[0]);
+    assert.strictEqual(application.mailSystem.write.mock.calls[1].arguments[0], names[1]);
+    assert.strictEqual(application.mailSystem.send.mock.calls[1].arguments[0], names[1]);
+
+    // //check call times
+    assert.strictEqual(application.mailSystem.write.mock.calls.length, names.length);
+    assert.strictEqual(application.mailSystem.send.mock.calls.length, names.length);  
+
+});
diff --git a/lab3/README.md b/lab3/README.md
new file mode 100644
index 00000000..f95c2ca0
--- /dev/null
+++ b/lab3/README.md
@@ -0,0 +1,29 @@
+# Lab3
+
+## Introduction
+
+In this lab, you will write unit tests for functions implemented in `main.js`. You can learn how to use classes and functions in it by uncommenting the code in it. (But remember don't commit them on GitHub)
+
+## Preparation (Important!!!)
+
+1. Sync fork on GitHub
+2. `git checkout -b lab3` (**NOT** your student ID !!!)
+
+## Requirement
+
+1. (40%) Write test cases in `main_test.js` and achieve 100% code coverage.
+2. (30%) For each function, parameterize their testcases to test the error-results.
+3. (30%) For each function, use at least 3 parameterized testcases to test the non-error-results.
+
+You can run `validate.sh` in your local to test if you satisfy the requirements.
+
+Please note that you must not alter files other than `main_test.js`. You will get 0 points if
+
+1. you modify other files to achieve requirements.
+2. you can't pass all CI on your PR.
+
+## Submission
+
+You need to open a pull request to your branch (e.g. 311XXXXXX, your student number) and contain the code that satisfies the abovementioned requirements.
+
+Moreover, please submit the URL of your PR to E3. Your submission will only be accepted when you present at both places.
diff --git a/lab3/main.js b/lab3/main.js
new file mode 100644
index 00000000..cee5de7f
--- /dev/null
+++ b/lab3/main.js
@@ -0,0 +1,34 @@
+class Calculator {
+    exp(x) {
+        if (!Number.isFinite(x)) {
+            throw Error('unsupported operand type');
+        }
+        const result = Math.exp(x);
+        if (result === Infinity) {
+            throw Error('overflow');
+        }
+        return result;
+    }
+
+    log(x) {
+        if (!Number.isFinite(x)) {
+            throw Error('unsupported operand type');
+        }
+        const result = Math.log(x);
+        if (result === -Infinity) {
+            throw Error('math domain error (1)');
+        }
+        if (Number.isNaN(result)) {
+            throw Error('math domain error (2)');
+        }
+        return result;
+    }
+}
+
+// const calculator = new Calculator();
+// console.log(calculator.exp(87));
+// console.log(calculator.log(48763));
+
+module.exports = {
+    Calculator
+};
\ No newline at end of file
diff --git a/lab3/main_test.js b/lab3/main_test.js
new file mode 100644
index 00000000..e6d6414e
--- /dev/null
+++ b/lab3/main_test.js
@@ -0,0 +1,5 @@
+const {describe, it} = require('node:test');
+const assert = require('assert');
+const { Calculator } = require('./main');
+
+// TODO: write your tests here
diff --git a/lab3/validate.sh b/lab3/validate.sh
new file mode 100755
index 00000000..7a758fb3
--- /dev/null
+++ b/lab3/validate.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# Check for unwanted files
+for file in *; do
+  if [[ $file != "main.js" && $file != "main_test.js" && $file != "README.md" && $file != "validate.sh" ]]; then
+    echo "[!] Unwanted file detected: $file."
+    exit 1
+  fi
+done
+
+node=$(which node)
+test_path="${BASH_SOURCE[0]}"
+solution_path="$(realpath .)"
+tmp_dir=$(mktemp -d -t lab3-XXXXXXXXXX)
+
+cd $tmp_dir
+
+rm -rf *
+cp $solution_path/*.js .
+result=$($"node" --test --experimental-test-coverage) ; ret=$?
+if [ $ret -ne 0 ] ; then
+  echo "[!] testing fails"
+  exit 1
+else
+  coverage=$(echo "$result" | grep 'all files' | awk -F '|' '{print $2}' | sed 's/ //g')
+  if (( $(echo "$coverage < 100" | bc -l) )); then
+    echo "[!] Coverage is only $coverage%"
+    exit 1
+  else
+    echo "[V] Coverage is 100%"
+  fi
+fi
+
+rm -rf $tmp_dir
+
+exit 0
+
+# vim: set fenc=utf8 ff=unix et sw=2 ts=2 sts=2:
\ No newline at end of file
diff --git a/lab4/README.md b/lab4/README.md
new file mode 100644
index 00000000..2a719b8b
--- /dev/null
+++ b/lab4/README.md
@@ -0,0 +1,29 @@
+# Lab4
+
+## Introduction
+
+In this lab, you will write tests in `main_test.js`. You can learn how to use [Puppeteer](https://pptr.dev/) to tests a web UI.
+
+## Preparation (Important!!!)
+
+1. Sync fork your branch (e.g., `SQLab:311XXXXXX`)
+2. `git checkout -b lab4` (**NOT** your student ID !!!)
+
+## Requirement
+
+1. (100%) Goto https://pptr.dev/, type `chipi chipi chapa chapa` into the search box, click on **1st** result in the **Docs** section, and print the title.
+
+For the detailed steps and hints, please check the slide of this lab.
+
+You can run `validate.sh` in your local to test if you satisfy the requirements.
+
+Please note that you must not alter files other than `main_test.js`. You will get 0 points if
+
+1. you modify other files to achieve requirements.
+2. you can't pass all CI on your PR.
+
+## Submission
+
+You need to open a pull request to your branch (e.g. 311XXXXXX, your student number) and contain the code that satisfies the abovementioned requirements.
+
+Moreover, please submit the URL of your PR to E3. Your submission will only be accepted when you present at both places.
diff --git a/lab4/main_test.js b/lab4/main_test.js
new file mode 100644
index 00000000..e37d21a5
--- /dev/null
+++ b/lab4/main_test.js
@@ -0,0 +1,22 @@
+const puppeteer = require('puppeteer');
+
+(async () => {
+    // Launch the browser and open a new blank page
+    const browser = await puppeteer.launch();
+    const page = await browser.newPage();
+
+    // Navigate the page to a URL
+    await page.goto('https://pptr.dev/');
+
+    // Hints:
+    // Click search button
+    // Type into search box
+    // Wait for search result
+    // Get the `Docs` result section
+    // Click on first result in `Docs` section
+    // Locate the title
+    // Print the title
+
+    // Close the browser
+    await browser.close();
+})();
\ No newline at end of file
diff --git a/lab4/package-lock.json b/lab4/package-lock.json
new file mode 100644
index 00000000..ced9fee4
--- /dev/null
+++ b/lab4/package-lock.json
@@ -0,0 +1,1174 @@
+{
+  "name": "lab4",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "dependencies": {
+        "puppeteer": "^22.5.0"
+      }
+    },
+    "node_modules/@babel/code-frame": {
+      "version": "7.24.1",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.24.1.tgz",
+      "integrity": "sha512-bC49z4spJQR3j8vFtJBLqzyzFV0ciuL5HYX7qfSl3KEqeMVV+eTquRvmXxpvB0AMubRrvv7y5DILiLLPi57Ewg==",
+      "dependencies": {
+        "@babel/highlight": "^7.24.1",
+        "picocolors": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@babel/helper-validator-identifier": {
+      "version": "7.22.20",
+      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.22.20.tgz",
+      "integrity": "sha512-Y4OZ+ytlatR8AI+8KZfKuL5urKp7qey08ha31L8b3BwewJAoJamTzyvxPR/5D+KkdJCGPq/+8TukHBlY10FX9A==",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@babel/highlight": {
+      "version": "7.24.1",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.24.1.tgz",
+      "integrity": "sha512-EPmDPxidWe/Ex+HTFINpvXdPHRmgSF3T8hGvzondYjmgzTQ/0EbLpSxyt+w3zzlYSk9cNBQNF9k0dT5Z2NiBjw==",
+      "dependencies": {
+        "@babel/helper-validator-identifier": "^7.22.20",
+        "chalk": "^2.4.2",
+        "js-tokens": "^4.0.0",
+        "picocolors": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@puppeteer/browsers": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/@puppeteer/browsers/-/browsers-2.2.0.tgz",
+      "integrity": "sha512-MC7LxpcBtdfTbzwARXIkqGZ1Osn3nnZJlm+i0+VqHl72t//Xwl9wICrXT8BwtgC6s1xJNHsxOpvzISUqe92+sw==",
+      "dependencies": {
+        "debug": "4.3.4",
+        "extract-zip": "2.0.1",
+        "progress": "2.0.3",
+        "proxy-agent": "6.4.0",
+        "semver": "7.6.0",
+        "tar-fs": "3.0.5",
+        "unbzip2-stream": "1.4.3",
+        "yargs": "17.7.2"
+      },
+      "bin": {
+        "browsers": "lib/cjs/main-cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@tootallnate/quickjs-emscripten": {
+      "version": "0.23.0",
+      "resolved": "https://registry.npmjs.org/@tootallnate/quickjs-emscripten/-/quickjs-emscripten-0.23.0.tgz",
+      "integrity": "sha512-C5Mc6rdnsaJDjO3UpGW/CQTHtCKaYlScZTly4JIu97Jxo/odCiH0ITnDXSJPTOrEKk/ycSZ0AOgTmkDtkOsvIA=="
+    },
+    "node_modules/@types/node": {
+      "version": "20.11.30",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.11.30.tgz",
+      "integrity": "sha512-dHM6ZxwlmuZaRmUPfv1p+KrdD1Dci04FbdEm/9wEMouFqxYoFl5aMkt0VMAUtYRQDyYvD41WJLukhq/ha3YuTw==",
+      "optional": true,
+      "dependencies": {
+        "undici-types": "~5.26.4"
+      }
+    },
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+      }
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+    },
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+        "string-width": "^4.1.0",
+        "strip-ansi": "^6.0.0"
+      },
+      "engines": {
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+      },
+      "funding": {
+        "url": "https://github.com/chalk/wrap-ansi?sponsor=1"
+      }
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+      },
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+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
+      }
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+      "engines": {
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+        "buffer-crc32": "~0.2.3",
+        "fd-slicer": "~1.1.0"
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+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
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+  }
+}
diff --git a/lab4/package.json b/lab4/package.json
new file mode 100644
index 00000000..5014ba08
--- /dev/null
+++ b/lab4/package.json
@@ -0,0 +1,5 @@
+{
+  "dependencies": {
+    "puppeteer": "^22.5.0"
+  }
+}
diff --git a/lab4/validate.sh b/lab4/validate.sh
new file mode 100755
index 00000000..e963b24b
--- /dev/null
+++ b/lab4/validate.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+
+# Check for unwanted files
+for file in *; do
+  if [[ $file != "node_modules" && $file != "main_test.js" && $file != "package-lock.json" && $file != "package.json" && $file != "README.md" && $file != "validate.sh" ]]; then
+    echo "[!] Unwanted file detected: $file."
+    exit 1
+  fi
+done
+
+node=$(which node)
+test_path="${BASH_SOURCE[0]}"
+solution_path="$(realpath .)"
+tmp_dir=$(mktemp -d -t lab4-XXXXXXXXXX)
+answer="Experimental WebDriver BiDi support"
+
+cd $tmp_dir
+
+rm -rf *
+cp $solution_path/*.js .
+cp $solution_path/*.json .
+
+# Install dependencies
+npm ci
+
+result=$($"node" main_test.js) ; ret=$?
+if [ $ret -ne 0 ] ; then
+  echo "[!] testing fails"
+  exit 1
+else
+  title=$(echo "$result" | head -1)
+  if [[ $title != $answer ]]; then
+    echo "[!] Expected: $answer"
+    echo "[!] Actual:   $title"
+    exit 1
+  else
+    echo "[V] Pass"
+  fi
+fi
+
+rm -rf $tmp_dir
+
+exit 0
+
+# vim: set fenc=utf8 ff=unix et sw=2 ts=2 sts=2:
\ No newline at end of file
diff --git a/lab5/Answer.md b/lab5/Answer.md
new file mode 100644
index 00000000..e8c0abdb
--- /dev/null
+++ b/lab5/Answer.md
@@ -0,0 +1,92 @@
+# Answer
+
+Name: 
+ID: 
+
+## Test Valgrind and ASan
+### Result
+|                      | Valgrind | Asan |
+| -------------------- | -------- | ---- |
+| Heap out-of-bounds   |          |      |
+| Stack out-of-bounds  |          |      |
+| Global out-of-bounds |          |      |
+| Use-after-free       |          |      |
+| Use-after-return     |          |      |
+
+### Heap out-of-bounds
+#### Source code
+```
+
+```
+#### Valgrind Report
+```
+
+```
+### ASan Report
+```
+
+```
+
+### Stack out-of-bounds
+#### Source code
+```
+
+```
+#### Valgrind Report
+```
+
+```
+### ASan Report
+```
+
+```
+
+### Global out-of-bounds
+#### Source code
+```
+
+```
+#### Valgrind Report
+```
+
+```
+### ASan Report
+```
+
+```
+
+### Use-after-free
+#### Source code
+```
+
+```
+#### Valgrind Report
+```
+
+```
+### ASan Report
+```
+
+```
+
+### Use-after-return
+#### Source code
+```
+
+```
+#### Valgrind Report
+```
+
+```
+### ASan Report
+```
+
+```
+
+## ASan Out-of-bound Write bypass Redzone
+### Source code
+```
+
+```
+### Why
+
diff --git a/lab5/Makefile b/lab5/Makefile
new file mode 100644
index 00000000..ff992551
--- /dev/null
+++ b/lab5/Makefile
@@ -0,0 +1,17 @@
+.PHONY: all
+all: uaf_asan
+
+uaf_asan: uaf.c libantiasan.so
+	gcc -fsanitize=address -Og -g -o $@ $< -lantiasan -L.
+
+libantiasan.so: antiasan.c
+	gcc -g -fPIC -c antiasan.c
+	gcc -shared antiasan.o -o libantiasan.so
+
+.PHINY: run
+run:
+	LD_LIBRARY_PATH=. ./uaf_asan
+
+.PHONY: clean
+clean:
+	rm uaf_asan antiasan.o libantiasan.so
diff --git a/lab5/README.md b/lab5/README.md
new file mode 100644
index 00000000..d5f47c2c
--- /dev/null
+++ b/lab5/README.md
@@ -0,0 +1,29 @@
+# Lab5
+
+## Introduction
+
+In this lab, you will write a function antoasan to bypass detection of ASan in `antiasan.c` and answer questions of slide in `Answer.md`.
+
+## Preparation (Important!!!)
+
+1. Sync fork your branch (e.g., `SQLab:311XXXXXX`)
+2. `git checkout -b lab5` (**NOT** your student ID !!!)
+
+## Requirement
+
+1. (50%) Test Valgrind and ASan to detect common memory corruption vulns, and then asnwer result, report of Valgrind/ASan and Vulnerable code in `Answer.md`.
+2. (40%) Write a vulnerable code to bypass redzone between 2 int [8] arrays and asnwer reason and code in `Answer.md`.
+
+3. (30%) write a function antoasan to bypass detection of ASan in `antiasan.c`.
+You can run `validate.sh` in your local to test if you satisfy the requirements.
+
+Please note that you must not alter files other than `antiasan.c` and `Answer.md`. You will get 0 points if
+
+1. you modify other files to achieve requirements.
+2. you can't pass all CI on your PR.
+
+## Submission
+
+You need to open a pull request to your branch (e.g. 311XXXXXX, your student number) and contain the code that satisfies the abovementioned requirements.
+
+Moreover, please submit the URL of your PR to E3. Your submission will only be accepted when you present at both places.
diff --git a/lab5/ans b/lab5/ans
new file mode 100644
index 00000000..bfd3d2cb
--- /dev/null
+++ b/lab5/ans
@@ -0,0 +1,3 @@
+LD_LIBRARY_PATH=. ./uaf_asan
+s[0x10] = H
+s[0x10] = H
diff --git a/lab5/antiasan.c b/lab5/antiasan.c
new file mode 100644
index 00000000..0c49d229
--- /dev/null
+++ b/lab5/antiasan.c
@@ -0,0 +1,5 @@
+// TODO:
+void antiasan(unsigned long addr)
+{
+
+}
diff --git a/lab5/antiasan.h b/lab5/antiasan.h
new file mode 100644
index 00000000..30351797
--- /dev/null
+++ b/lab5/antiasan.h
@@ -0,0 +1,6 @@
+#ifndef HIJACK_H
+#define HIJACK_H
+
+void antiasan(unsigned long);
+
+#endif
diff --git a/lab5/uaf.c b/lab5/uaf.c
new file mode 100644
index 00000000..16feb47d
--- /dev/null
+++ b/lab5/uaf.c
@@ -0,0 +1,15 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "antiasan.h"
+
+int main(void)
+{
+        char *s = (char *)malloc(0x18);
+        strcpy(s, "HAHAHAHAHAHAHAHAHAHAHAH");
+        printf("s[0x10] = %c\n", s[0x10]);
+        free(s);
+        antiasan((unsigned long)&s[0x10]);
+        printf("s[0x10] = %c\n", s[0x10]);
+        return 0;
+}
diff --git a/lab5/validate.sh b/lab5/validate.sh
new file mode 100755
index 00000000..cf879bdc
--- /dev/null
+++ b/lab5/validate.sh
@@ -0,0 +1,43 @@
+#!/bin/bash
+
+# Check for unwanted files
+for file in *; do
+  if [[ $file != "uaf.c" && $file != "antiasan.c" && $file != "antiasan.h" && $file != "Makefile" && $file != "README.md" && $file != "Answer.md" && $file != "validate.sh" && $file != "ans" ]]; then
+    echo "[!] Unwanted file detected: $file."
+    exit 1
+  fi
+done
+
+test_path="${BASH_SOURCE[0]}"
+solution_path="$(realpath .)"
+tmp_dir=$(mktemp -d -t lab5-XXXXXXXXXX)
+answer=""
+
+cd $tmp_dir
+
+rm -rf *
+cp $solution_path/Makefile .
+cp $solution_path/*.c .
+cp $solution_path/*.h .
+cp $solution_path/ans .
+
+make
+make run > out 2>&1
+result=$(diff ans out)
+if [[ -n $result ]]; then
+  echo "[!] Expected: "
+  cat ans
+  echo ""
+  echo "[!] Actual:   "
+  cat out
+  echo ""
+  exit 1
+else
+  echo "[V] Pass"
+fi
+
+rm -rf $tmp_dir
+
+exit 0
+
+# vim: set fenc=utf8 ff=unix et sw=2 ts=2 sts=2:
diff --git a/lab6/.gitignore b/lab6/.gitignore
new file mode 100644
index 00000000..1a6229dc
--- /dev/null
+++ b/lab6/.gitignore
@@ -0,0 +1,2 @@
+fuzz/
+src/bmpcomp
diff --git a/lab6/Answer.md b/lab6/Answer.md
new file mode 100644
index 00000000..fabc82e6
--- /dev/null
+++ b/lab6/Answer.md
@@ -0,0 +1,12 @@
+Name: 
+ID: 
+
+### Fuzz Monitor
+```
+
+```
+
+### Run Crash Result
+```
+
+```
diff --git a/lab6/src/1.bmp b/lab6/src/1.bmp
new file mode 100644
index 00000000..edcc39db
Binary files /dev/null and b/lab6/src/1.bmp differ
diff --git a/lab6/src/hw0302.c b/lab6/src/hw0302.c
new file mode 100644
index 00000000..1e9a9d6e
--- /dev/null
+++ b/lab6/src/hw0302.c
@@ -0,0 +1,59 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+typedef struct _BMPHeader {
+	char BM[2];
+	uint32_t size;
+	uint32_t reserve;
+	uint32_t offset;
+	uint32_t header_size;
+	uint32_t width;
+	uint32_t height;
+	uint16_t planes;
+	uint16_t bpp;
+	uint32_t compression;
+	uint32_t bitmap_size;
+	uint32_t h_res;
+	uint32_t v_res;
+	uint32_t palette;
+	uint32_t important;
+}__attribute__((__packed__)) Header;
+int main(int argc, char **argv) {
+	FILE *pF[9];
+	char *filename = argv[1];
+	for ( int i=0; i<9; ++i ) {
+		pF[i] = fopen(filename, "rb");
+		if ( pF[i] == NULL ) {
+			printf("error! file %s doesn't exist.\n", filename);
+			return 0;
+		}
+	}
+	char output[11] = {'o', 'u', 't', 'p', 'u', 't', '.', 'b', 'm', 'p', '\0'};
+	FILE *pR = fopen(output, "wb");
+	Header H[9], res;
+	printf("size of Herder %d\n", sizeof(Header));
+	for ( int i=0; i<9; ++i )	fread(H+i, sizeof(Header), 1, pF[i]);
+	res = H[0];
+	res.height = H[0].height + H[3].height + H[6].height;
+	res.width = H[0].width + H[1].width + H[2].width;
+	res.bitmap_size = res.height*res.width*3+(res.width%4*res.height);
+	res.size = res.bitmap_size + res.offset;
+	fwrite(&res, sizeof(Header), 1, pR);
+	for ( int i=2; i<9; i+=3 ) {
+		for ( int j=0; j<H[i].height; ++j ) {
+			for ( int k=0; k<3; ++k ) {
+				uint8_t data[H[i-k].width*3];
+				fread(data, sizeof(uint8_t), H[i-k].width*3, pF[i-k]);
+				fwrite(data, sizeof(uint8_t), H[i-k].width*3, pR);
+				fseek(pF[i-k], H[i-k].width%4, SEEK_CUR);
+			}
+			uint8_t padding;
+			for ( int k=0; k<res.width%4; ++k )	fwrite(&padding, sizeof(uint8_t), 1, pR);
+		}
+	}
+	for ( int i=0; i<9; ++i )	fclose(pF[i]);
+	fclose(pR);
+	puts("done!");
+	return 0;
+}
diff --git a/lab6/src/makefile b/lab6/src/makefile
new file mode 100644
index 00000000..f97d81f7
--- /dev/null
+++ b/lab6/src/makefile
@@ -0,0 +1,2 @@
+bmpcomp: hw0302.c
+	$(CC) $< -std=c11 -lm -o $@
diff --git a/lab6/validate.sh b/lab6/validate.sh
new file mode 100755
index 00000000..c952942f
--- /dev/null
+++ b/lab6/validate.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# Check for unwanted files
+for file in *; do
+  if [[ $file != "src" && $file != "src/makefile" && $file != "src/hw0302.c" && $file != "src/1.bmp" && $file != "Answer.md" && $file != "validate.sh" ]]; then
+    echo "[!] Unwanted file detected: $file."
+    exit 1
+  fi
+done
+
+echo "[V] Pass"
+
+exit 0
+
+# vim: set fenc=utf8 ff=unix et sw=2 ts=2 sts=2:
diff --git a/lab7/Makefile b/lab7/Makefile
new file mode 100644
index 00000000..47db0d2b
--- /dev/null
+++ b/lab7/Makefile
@@ -0,0 +1,7 @@
+login: login.o
+
+login.o: login.c
+
+.PHONY: clean
+clean:
+	rm login login.o
diff --git a/lab7/README.md b/lab7/README.md
new file mode 100644
index 00000000..37076c51
--- /dev/null
+++ b/lab7/README.md
@@ -0,0 +1,25 @@
+# Lab7
+
+## Introduction
+
+In this lab, you will write a python script with Angr to find the password in executalbe file named 'login'.
+
+## Preparation (Important!!!)
+
+1. Sync fork your branch (e.g., `SQLab:311XXXXXX`)
+2. `git checkout -b lab7` (**NOT** your student ID !!!)
+
+## Requirement
+
+1. (100%) Detect the condition that login will print 'Login successful' if login success and print 'Login failed' if login fail, find the input of successful condition by Angr.
+
+Please note that you must not alter files other than `sol.py` or just print the input. You will get 0 points if
+
+1. you modify other files to achieve requirements.
+2. you can't pass all CI on your PR.
+
+## Submission
+
+You need to open a pull request to your branch (e.g. 311XXXXXX, your student number) and contain the code that satisfies the abovementioned requirements.
+
+Moreover, please submit the URL of your PR to E3. Your submission will only be accepted when you present at both places.
diff --git a/lab7/login.c b/lab7/login.c
new file mode 100644
index 00000000..e6d863c9
--- /dev/null
+++ b/lab7/login.c
@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int encrypt(int a1, int a2) {
+        if ( a1 <= 0x40 || a1 > 90 ) {
+                puts("Login failed");
+                exit(1);
+        }
+        return (0x1F * a2 + a1 - 65) % 26 + 65;
+}
+
+int main(void) {
+        char secret[0x20] = "VXRRJEURXDASBFHM";
+        char pwd[0x20] = {0};
+
+        printf("Enter the password: ");
+        scanf("%16s", pwd);
+        for ( int j = 0; j < 0x10; ++j )
+                pwd[j] = encrypt(pwd[j], j + 8);
+        if ( !strcmp(secret, pwd) )
+                puts("Login successful");
+        else
+                puts("Login failed");
+        return 0;
+}
diff --git a/lab7/sol.py b/lab7/sol.py
new file mode 100644
index 00000000..b5d2ec85
--- /dev/null
+++ b/lab7/sol.py
@@ -0,0 +1,17 @@
+import angr, sys
+
+def success_condition(state):
+    return b"Login successful" in state.posix.dumps(sys.stdout.fileno())
+
+def fail_condition(state):
+    return b"Login failed" in state.posix.dumps(sys.stdout.fileno())
+
+proj = angr.Project("./login")
+
+init_state = proj.factory.entry_state()
+simulation = proj.factory.simgr(init_state)
+simulation.explore(find=success_condition, avoid=fail_condition)
+
+
+solution = simulation.found[0]
+print(solution.posix.dumps(sys.stdin.fileno()))
diff --git a/lab7/validate.sh b/lab7/validate.sh
new file mode 100755
index 00000000..a6be9226
--- /dev/null
+++ b/lab7/validate.sh
@@ -0,0 +1,42 @@
+#!/bin/bash
+
+# Check for unwanted files
+for file in *; do
+  if [[ $file != "login.c" && $file != "sol.py" && $file != "Makefile" && $file != "README.md" && $file != "validate.sh" ]]; then
+    echo "[!] Unwanted file detected: $file."
+    exit 1
+  fi
+done
+
+test_path="${BASH_SOURCE[0]}"
+solution_path="$(realpath .)"
+tmp_dir=$(mktemp -d -t lab7-XXXXXXXXXX)
+answer=""
+
+cd $tmp_dir
+
+pip install angr
+rm -rf *
+cp $solution_path/Makefile .
+cp $solution_path/*.c .
+cp $solution_path/sol.py .
+
+make
+result=$(python3 sol.py)
+if [[ $result != "b'HETOBRCUVWOBFEBB'" ]]; then
+  echo "[!] Expected: "
+  echo "b'HETOBRCUVWOBFEBB'"
+  echo ""
+  echo "[!] Actual:   "
+  echo $result
+  echo ""
+  exit 1
+else
+  echo "[V] Pass"
+fi
+
+rm -rf $tmp_dir
+
+exit 0
+
+# vim: set fenc=utf8 ff=unix et sw=2 ts=2 sts=2:
diff --git a/scripts/merge-all.sh b/scripts/merge-all.sh
new file mode 100755
index 00000000..4743ac08
--- /dev/null
+++ b/scripts/merge-all.sh
@@ -0,0 +1,29 @@
+#!/bin/bash
+
+if [ $# -ne 1 ]; then
+    echo "$0 <commit-message>"
+    exit 1
+fi
+
+git fetch origin
+
+for branch in $(git branch -r | grep -v HEAD); do
+    # Remove the "origin/" prefix
+    branch=${branch#origin/}
+
+    if [[ "$branch" != "main" ]]; then
+        git checkout "$branch"
+        if [[ $? -ne 0 ]]; then
+            echo "Checkout failed for branch $branch"
+            exit 1
+        fi
+        git merge --squash -s recursive -X theirs main
+        if [[ $? -ne 0 ]]; then
+            echo "Merge failed for branch $branch"
+            exit 1
+        fi
+        git commit -m "$1"
+    fi
+done
+
+git checkout main