diff --git a/ai_providers/ai_perplexity.py b/ai_providers/ai_perplexity.py
index cee06c1..6702e2a 100644
--- a/ai_providers/ai_perplexity.py
+++ b/ai_providers/ai_perplexity.py
@@ -234,7 +234,8 @@ class PerplexityManager:
             wait_msg = "正在启用满血模式研究中...." if full_research_available else "正在联网查询，请稍候..."
             if enable_full_research and not full_research_available:
                 self.LOG.warning("收到满血模式请求，但未配置推理模型，退回普通模式。")
-            send_text_func(wait_msg, at_list=at_user or "", record_message=False)
+            # 等待提示无需 @ 用户，避免频繁打扰
+            send_text_func(wait_msg, at_list="", record_message=False)
             
             # 添加线程完成回调，自动清理线程
             def thread_finished_callback():
diff --git a/robot.py b/robot.py
index 4de721b..fc4a6e9 100644
--- a/robot.py
+++ b/robot.py
@@ -382,8 +382,10 @@ class Robot(Job):
                 return
             self._msg_timestamps.append(now)
 
+        # 去除 Markdown 粗体标记，避免微信端出现多余符号
+        msg = msg.replace("**", "")
         ats = ""
-        message_to_send = msg # 保存原始消息用于记录
+        message_to_send = msg # 保存清理后的消息用于记录
         if at_list:
             if at_list == "notify@all":
                 ats = " @所有人"