diff --git a/application/common/service/LLMService.php b/application/common/service/LLMService.php
index ab5f9e72..ce66056c 100644
--- a/application/common/service/LLMService.php
+++ b/application/common/service/LLMService.php
@@ -57,7 +57,7 @@ class LLMService
             $referText = mb_substr($referText, 0, 4000);
         }
 
-        $system = $this->buildReferenceCheckSystemPrompt();
+        $system = $this->buildReferenceCheckSystemPrompt3();
         \think\Log::info('system:' . $system);
 
         $user = $this->buildReferenceCheckUserPrompt($contextText, $referText);