diff --git a/README.md b/README.md
index bc5c2f6..ace222d 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,15 @@ Command | Parameter(s) | Description
 `/ping` | N/A | Return current session information
 `/poem` | N/A | Read poetry (TBD)
 
+### Placeholder
+
+Bot is now support placeholder, using them in welcome message, 
+bot will auto-replace them to what you wish
+
+Placeholder | Replace to
+---|----
+`$name` | new user first name
+
 ### Flags detail
 
 Flag | Description | Default status
@@ -24,13 +33,13 @@ noblue | While bot is admin, it will delete bot command after 5 seconds (need de
 
 ### Example
 
-Set welcome message to **Welcome to my group**:
+Set welcome message to **Welcome [who] to my group**:
 ```
-/setwelcome **Welcome to my group**
+/setwelcome **Welcome $name to my group**
 ```
 or
 ```
-/setwelcome https://gist.githubusercontent.com/anonymous/a196757970b0358db6e69f4cc8413ce5/raw/1a548bf3c2d1c7d38cd1fde70c6a612b5d58f524/welcomemsg
+/setwelcome https://gist.githubusercontent.com/anonymous/6446fbae52916bc7fb092dd1ee3f8483/raw/4ad5231d5e2a68458e117db9bed97407dfe6f47b/welcomemsg
 ```
 
 _After you run this command, bot will reply your a message_
diff --git a/botlib/groupcache.py b/botlib/groupcache.py
index 4e6ba04..a65e530 100644
--- a/botlib/groupcache.py
+++ b/botlib/groupcache.py
@@ -41,6 +41,7 @@ def add(self,x,need_check_admin=True,not_found=False):
 				if not not_found:
 					self.__db_del(x[0])
 					Log.info('Delete kicked chat:{}',x[0])
+					return
 			except telepot.exception.TelegramError as e:
 				if e[0] == 'Bad Request: chat not found':
 					if not not_found:
@@ -52,6 +53,8 @@ def add(self,x,need_check_admin=True,not_found=False):
 					Log.error('Delete kicked chat:{}', x[0])
 				else:
 					raise e
+			finally:
+				result = 0
 		else:
 			result = 0
 		self.g[x[0]]={'msg' : x[1],
diff --git a/botlib/tgbot.py b/botlib/tgbot.py
index 19b3bd4..fab6e71 100644
--- a/botlib/tgbot.py
+++ b/botlib/tgbot.py
@@ -88,6 +88,7 @@ def onMessage(self,msg):
 		Log.debug(3,'Incoming message')
 		content_type, chat_type, chat_id = self.glance(msg)
 		Log.debug(3, '[msg = {}]', msg)
+		# Added process
 		if content_type == 'new_chat_member' and msg['new_chat_participant']['id'] == self.getid():
 			self.gcache.add((chat_id,None,0,1,0))
 			with MainDatabase() as db:
@@ -102,13 +103,15 @@ def onMessage(self,msg):
 			self.sendMessage(chat_id,'Please using /setwelcome to setting welcome message',
 				reply_to_message_id=msg['message_id'])
 			return
+		# kicked process
 		if content_type == 'left_chat_member' and msg['left_chat_member']['id'] == self.getid():
 			self.gcache.delete(chat_id)
 			return
+		# Main process
 		if msg['chat']['type'] in group_type:
 			if content_type == 'text' and 'entities' in msg and msg[
-				'entities'][0]['type'] == 'bot_command': #msg['text'][0] =='/':
-
+				'entities'][0]['type'] == 'bot_command' and msg[
+					'text'][0] == '/': # Prevent suchas './sudo'
 				get_result = self.gcache.get(chat_id)
 				if get_result['noblue']:
 					delete_target_message(self.bot,chat_id,msg['message_id']).start()
@@ -201,5 +204,5 @@ def onMessage(self,msg):
 			elif content_type in content_type_concerned:
 				result = self.gcache.get(chat_id)['msg']
 				if result:
-					self.sendMessage(chat_id,b64decode(result),parse_mode='Markdown',
-						disable_web_page_preview=True,reply_to_message_id=msg['message_id'])
+					self.sendMessage(chat_id,b64decode(result).replace('$name',msg['new_chat_participant']['first_name']),
+						parse_mode='Markdown',disable_web_page_preview=True,reply_to_message_id=msg['message_id'])
diff --git a/libpy b/libpy
index 51ddf67..56d9e30 160000
--- a/libpy
+++ b/libpy
@@ -1 +1 @@
-Subproject commit 51ddf67e3b2b6cc2ea3b85e5b145f63764220afe
+Subproject commit 56d9e308888e4f1de4eda4eafe1a72a17ce7193d
diff --git a/main.py b/main.py
index a180853..5b722db 100644
--- a/main.py
+++ b/main.py
@@ -13,11 +13,10 @@
 import libpy.BackupSQL as BackupSQL
 
 def main():
-	global bot,group_cache,poem_cache
 	Log.info('Strat initializing....')
 	Log.info('Debug enable: {}',Log.get_debug_info()[0])
 	Log.debug(1,'Debug level: {}',Log.get_debug_info()[1])
-	bot = bot_class()
+	bot_class()
 	Log.info('Bot is now running!')
 	Log.info('Starting BackupSQL daemon')
 	BackupSQL.sql_backup_daemon().start()