diff --git a/service/llm_service.go b/service/llm_service.go
index 9d2bfbb..4e8c24d 100644
--- a/service/llm_service.go
+++ b/service/llm_service.go
@@ -395,7 +395,7 @@ func (s *LLMService) handleStreamingResponse(req *http.Request, data map[string]
 					"!": true, "！": true, // 感叹号
 					"?": true, "？": true, // 问号
 					";": true, "；": true, // 分号
-					":": true, "：": true, // 冒号
+					"：": true, // 冒号
 					"、": true,
 				}