diff --git a/db/contacts_db.py b/db/contacts_db.py
index 216cdc6..e1b2345 100644
--- a/db/contacts_db.py
+++ b/db/contacts_db.py
@@ -504,7 +504,7 @@ class ContactsDBOperator(BaseDBOperator):
 
             data = {
                 'chatroom_id': get_str('UserName'),
-                'nick_name': get_str('NickName'),
+                'nick_name': get_str('NickName',"未知群名"),
                 'py_initial': get_str('Pyinitial'),
                 'quan_pin': get_str('QuanPin'),
                 'sex': chatroom_data.get('Sex', 0),
diff --git a/robot.py b/robot.py
index aa20c54..fdcbc91 100644
--- a/robot.py
+++ b/robot.py
@@ -167,7 +167,7 @@ class Robot:
                 self.ipad_bot.nickname = profile.get("NickName").get("string")
                 self.ipad_bot.alias = profile.get("Alias")
                 self.ipad_bot.phone = profile.get("BindMobile").get("string")
-                self.ipad_bot.signature = profile.get("Signature")
+                self.ipad_bot.signature = profile.get("Signature", "")
                 # 更新Robot类的属性
                 self.wxid = self.ipad_bot.wxid
                 self.nickname = self.ipad_bot.nickname
@@ -316,7 +316,7 @@ class Robot:
             self.ipad_bot.nickname = data.get("acctSectResp").get("nickName")
             self.ipad_bot.alias = data.get("acctSectResp").get("alias")
             self.ipad_bot.phone = data.get("acctSectResp").get("bindMobile")
-            self.ipad_bot.signature = data.get("Signature")
+            self.ipad_bot.signature = data.get("Signature", "")
 
             # 更新Robot类的属性
             self.wxid = self.ipad_bot.wxid
@@ -393,6 +393,7 @@ class Robot:
                 try:
                     chatroom_info = await self.ipad_bot.get_chatroom_info(group_id)
                     self.LOG.debug(f"获取到群信息: {chatroom_info}")
+                    self.allContacts[group_id] = chatroom_info.get('NickName', "未知群名")
                     if chatroom_info:
                         # 保存群信息到数据库
                         self.contacts_db.save_chatroom_info(chatroom_info)