diff --git a/app/handlers/info_handler.py b/app/handlers/info_handler.py
index 203a5d4..18e728e 100644
--- a/app/handlers/info_handler.py
+++ b/app/handlers/info_handler.py
@@ -1,7 +1,12 @@
-# info.py
+# info_handler.py
 
 from telebot import TeleBot
 from telebot.types import Message
 
+from app.services.info_service import generate_info
+
 def get_info(message: Message, bot: TeleBot):
-    bot.send_message(message.chat.id, "Hello, I'm a bot of Randomology ~")
+    name = message.from_user.first_name
+    id = message.from_user.id
+    info = generate_info(name, id)
+    bot.send_message(message.chat.id, info, parse_mode="MarkdownV2")
diff --git a/app/handlers/member_handler.py b/app/handlers/member_handler.py
new file mode 100644
index 0000000..cd70a3e
--- /dev/null
+++ b/app/handlers/member_handler.py
@@ -0,0 +1,14 @@
+ # member_hander.py
+
+from telebot import TeleBot
+from telebot.types import Message
+
+from app.services.member_service import generate_welcome
+
+# invoke when new member joins
+def get_welcome(message:Message, bot:TeleBot):
+    # typing ...
+    bot.send_chat_action(message.chat.id, "typing")
+    new_member = message.new_chat_members
+    welcome = generate_welcome(new_member[0].first_name, new_member[0].id)
+    bot.send_message(message.chat.id, welcome, parse_mode="MarkdownV2")
diff --git a/app/handlers/text_handler.py b/app/handlers/text_handler.py
index 8ab04ba..24cdf6e 100644
--- a/app/handlers/text_handler.py
+++ b/app/handlers/text_handler.py
@@ -1,4 +1,4 @@
-# random_text.py
+# text_handler.py
 from telebot import TeleBot
 from telebot.types import Message
 
diff --git a/app/services/info_service.py b/app/services/info_service.py
new file mode 100644
index 0000000..88a683c
--- /dev/null
+++ b/app/services/info_service.py
@@ -0,0 +1,7 @@
+# info_service.py
+
+from configs import templates
+
+# generate info 
+def generate_info(name, id):
+    return templates.INFO_MESSAGE.format(name=name, id=id)
diff --git a/app/services/member_service.py b/app/services/member_service.py
new file mode 100644
index 0000000..24243e9
--- /dev/null
+++ b/app/services/member_service.py
@@ -0,0 +1,7 @@
+# member_service.py
+
+from configs import templates
+
+# generate welcome message
+def generate_welcome(name, id):
+    return templates.WELCOME_MESSAGE.format(name=name, id=id)
diff --git a/bot.py b/bot.py
index b6613aa..e848e8f 100644
--- a/bot.py
+++ b/bot.py
@@ -11,6 +11,7 @@
 from app.handlers.audio_handler import get_random_sine
 from app.handlers.audio_handler import get_random_mix
 from app.handlers.audio_handler import get_random_voice
+from app.handlers.member_handler import get_welcome
 from app.handlers.inline_handler import inline_dispatch
 
 # pyTelegramBotAPI
@@ -44,6 +45,8 @@ def handlers():
     bot.register_message_handler(get_random_mix, commands=['mix'], pass_bot=True)
     # random voice (a mix of noise and sine wave sent as voice)
     bot.register_message_handler(get_random_voice, commands=['voice'], pass_bot=True)
+    # chat member change
+    bot.register_message_handler(get_welcome, content_types=['new_chat_members'], pass_bot=True)
     # inline
     bot.register_inline_handler(inline_dispatch, lambda query: query, pass_bot=True)
     
diff --git a/configs/templates.py b/configs/templates.py
new file mode 100644
index 0000000..8873e00
--- /dev/null
+++ b/configs/templates.py
@@ -0,0 +1,12 @@
+# templates
+
+# welcome message, will be parsed as markdown
+WELCOME_MESSAGE="""
+[{name}](tg://user?id={id}), 我们信任您加入本群时已经从系统管理员那里了解了日常注意事项，总结起来无外乎以下三点:
+\#1\) ""?'\*\!\*:\!\$\?\*:\*?\*?:😈😈
+\#2\) Rhrhd dhod dbdog
+\#3\) цзц Иатщв, Лоботомия\!\!\!
+"""
+INFO_MESSAGE="""
+您好，[{name}](tg://user?id={id})，我是[Randomology Bot](https://github.com/ravachol-yang/randomology)
+"""
diff --git a/tests/info_test.py b/tests/info_test.py
new file mode 100644
index 0000000..743f524
--- /dev/null
+++ b/tests/info_test.py
@@ -0,0 +1,11 @@
+# info_test.py
+
+from app.services.info_service import generate_info
+from configs import templates
+
+def test_welcome_template():
+    assert isinstance(templates.INFO_MESSAGE, str)
+
+def test_info_generated():
+    info = generate_info("test", 111)
+    assert isinstance(info, str)
diff --git a/tests/member_test.py b/tests/member_test.py
new file mode 100644
index 0000000..05fc5a8
--- /dev/null
+++ b/tests/member_test.py
@@ -0,0 +1,11 @@
+# member tests
+
+from app.services.member_service import generate_welcome
+from configs import templates
+
+def test_welcome_template():
+    assert isinstance(templates.WELCOME_MESSAGE, str)
+
+def test_welcome_generated():
+    welcome = generate_welcome("test",111)
+    assert isinstance(welcome, str)