diff --git a/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application.Contracts/Dtos/OpenAi/ThorChatCompletionsRequest.cs b/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application.Contracts/Dtos/OpenAi/ThorChatCompletionsRequest.cs
index 0c83885b..5f553eba 100644
--- a/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application.Contracts/Dtos/OpenAi/ThorChatCompletionsRequest.cs
+++ b/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application.Contracts/Dtos/OpenAi/ThorChatCompletionsRequest.cs
@@ -42,14 +42,26 @@ public class ThorChatCompletionsRequest
     public string? Prompt { get; set; }
 
     private const string CodeCompletionPrompt = """
-                                                Provide the provided content, predict and complete the code:
-                                                Requirement: 
-                                                1:Only need to output completion content, do not add additional content
-                                                2:The last part of the code that needs to be completed is :{0}
-                                                3:The following is the provided context and the preceding section :{1}
-                                                4：Do not include ``` markdown format in the output, display it directly in plain text
-                                                5：The returned content should not be duplicated with the given part. Remove the duplicated parts and complete them backwards
-                                                6: The returned comments need to be in Chinese
+                                                You are a code modification assistant. Your task is to modify the provided code based on the user's instructions.
+                                                
+                                                Rules:
+                                                1. Return only the modified code, with no additional text or explanations.
+                                                2. The first character of your response must be the first character of the code.
+                                                3. The last character of your response must be the last character of the code.
+                                                4. NEVER use triple backticks (```) or any other markdown formatting in your response.
+                                                5. Do not use any code block indicators, syntax highlighting markers, or any other formatting characters.
+                                                6. Present the code exactly as it would appear in a plain text editor, preserving all whitespace, indentation, and line breaks.
+                                                7. Maintain the original code structure and only make changes as specified by the user's instructions.
+                                                8. Ensure that the modified code is syntactically and semantically correct for the given programming language.
+                                                9. Use consistent indentation and follow language-specific style guidelines.
+                                                10. If the user's request cannot be translated into code changes, respond only with the word NULL (without quotes or any formatting).
+                                                11. Do not include any comments or explanations within the code unless specifically requested.
+                                                12. Assume that any necessary dependencies or libraries are already imported or available.
+                                                
+                                                IMPORTANT: Your response must NEVER begin or end with triple backticks, single backticks, or any other formatting characters.
+                                                
+                                                The relevant context before the current editing content is: {0}.
+                                                After the current editing content is: {1}.
                                                 """;
 
     /// <summary>
@@ -59,11 +71,12 @@ public class ThorChatCompletionsRequest
     {
         if (Messages is null || !Messages.Any())
         {
+            //兼容代码补全模式，Prompt为当前代码前内容，Suffix为当前代码后内容
             Messages = new List<ThorChatMessage>()
             {
                 new ThorChatMessage
                 {
-                    Role = "user",
+                    Role = "system",
                     Content = string.Format(CodeCompletionPrompt, Prompt, Suffix)
                 }
             };