diff --git a/channel/chat_channel.py b/channel/chat_channel.py
index 6e2a45c..27f3af0 100644
--- a/channel/chat_channel.py
+++ b/channel/chat_channel.py
@@ -117,6 +117,7 @@ class ChatChannel(Channel):
                         logger.info("[chat_channel]receive group at")
                         if not conf().get("group_at_off", False):
                             flag = True
+                        self.name = self.name if self.name is not None else ""  # 部分渠道self.name可能没有赋值
                         pattern = f"@{re.escape(self.name)}(\u2005|\u0020)"
                         subtract_res = re.sub(pattern, r"", content)
                         if isinstance(context["msg"].at_list, list):
diff --git a/channel/dingtalk/dingtalk_message.py b/channel/dingtalk/dingtalk_message.py
index 1bba85d..7806907 100644
--- a/channel/dingtalk/dingtalk_message.py
+++ b/channel/dingtalk/dingtalk_message.py
@@ -49,6 +49,7 @@ class DingTalkMessage(ChatMessage):
         if self.is_group:
             self.from_user_id = event.conversation_id
             self.actual_user_id = event.sender_id
+            self.is_at = True  # 群聊内，只有被艾特时候才会收到消息
         else:
             self.from_user_id = event.sender_id
             self.actual_user_id = event.sender_id