diff --git a/message_sign/config.toml b/message_sign/config.toml
index 8bfce4b..4bccb06 100644
--- a/message_sign/config.toml
+++ b/message_sign/config.toml
@@ -1,6 +1,6 @@
 [SignIn]
 enable = true
-command = ["签到", "每日签到", "qd", "Qd", "QD"]
+command = ["签到", "每日签到", "qd", "Qd", "QD", "上班"]
 min-point = 3
 max-point = 20
 streak-cycle = 5 # 每签到?天后，额外积分奖励加1点？
diff --git a/message_sign/main.py b/message_sign/main.py
index be6d726..e8eca94 100644
--- a/message_sign/main.py
+++ b/message_sign/main.py
@@ -1,4 +1,4 @@
-import datetime
+from datetime import datetime, timedelta
 import logging
 import mysql.connector.pooling
 import tomllib
@@ -161,16 +161,24 @@ class SignInSystem:
         if self.gbm.get_group_permission(message.roomid, Feature.SIGNIN) == PermissionStatus.DISABLED:
             return
 
-        current_time = datetime.datetime.now(tz=pytz.timezone(self.timezone))
-        today_start = current_time.replace(hour=0, minute=0, second=0, microsecond=0)
-        yesterday = today_start - datetime.timedelta(days=1)
+        # 获取当前时间，带有时区信息
+        current_time = datetime.now(tz=pytz.timezone(self.timezone))
 
+        # 获取当天零点的时间
+        today_start = current_time.replace(hour=0, minute=0, second=0, microsecond=0)
+
+        # 获取昨天的时间
+        yesterday = today_start - timedelta(days=1)
+
+        # 获取用户的签到记录
         user_record = self.get_user_record(message.sender, message.roomid)
         wx_nick_name = self.all_contacts.get(message.sender, message.sender)
 
+        # 判断用户是否已经签到过
         if user_record and user_record['sign_stat'] and user_record['sign_stat'] >= today_start:
             self.wcf.send_text(
                 f"@{wx_nick_name} 您今天已经签到过了！当前积分：{user_record['points']}",
+                (message.roomid if message.from_group() else message.sender),
                 message.sender
             )
             return
@@ -230,4 +238,3 @@ class SignInSystem:
     def __del__(self):
         """连接池由外部管理，不需要手动关闭"""
         pass
-