diff --git a/str.go b/str.go
index 816ba02..227834b 100644
--- a/str.go
+++ b/str.go
@@ -85,7 +85,13 @@ func MaskChineseName(name string) (masked string) {
 }
 
 // MaskChineseNameEx 中文姓名脱敏，可以指定左右保留字符数量
-// 示例：MaskChineseNameEx("张一二", 1, 1) => "*一*" 左边1位替代、右边1位替代
+//
+// 示例1：MaskChineseNameEx("张一二", 1, 1) => "张*二" 左边保留1个字符、右边保留1个字符
+//
+// 示例2：
+//
+//	name := "张一二"
+//	MaskChineseNameEx(name, 0, utf8.RuneCountInString(name)-1) => "*一二" 左边保留0个字符、右边保留所有字符少1个
 func MaskChineseNameEx(name string, left, right int) (masked string) {
 	size := utf8.RuneCountInString(name)
 	if size == 0 {
diff --git a/str_test.go b/str_test.go
index eaef166..ae54868 100644
--- a/str_test.go
+++ b/str_test.go
@@ -1,6 +1,9 @@
 package kgo
 
-import "testing"
+import (
+	"testing"
+	"unicode/utf8"
+)
 
 func TestClean(t *testing.T) {
 	resources := map[string]string{
@@ -169,6 +172,24 @@ func TestMaskChineseNameEx4(t *testing.T) {
 	}
 }
 
+func TestMaskChineseNameEx5(t *testing.T) {
+	name := "张一二"
+	excepted := "张*二"
+	actual := MaskChineseNameEx(name, 1, 1)
+	if actual != excepted {
+		t.Fatalf("预期 %v，实际值：%v", excepted, actual)
+	}
+}
+
+func TestMaskChineseNameEx6(t *testing.T) {
+	name := "张一二"
+	excepted := "*一二"
+	actual := MaskChineseNameEx(name, 0, utf8.RuneCountInString(name)-1)
+	if actual != excepted {
+		t.Fatalf("预期 %v，实际值：%v", excepted, actual)
+	}
+}
+
 func TestMaskChineseMobile(t *testing.T) {
 	tel := "13012345678"
 	excepted := "130****5678"