diff --git a/apps/application/flow/i_step_node.py b/apps/application/flow/i_step_node.py
index 286b2b495..23822b6d2 100644
--- a/apps/application/flow/i_step_node.py
+++ b/apps/application/flow/i_step_node.py
@@ -94,6 +94,7 @@ class WorkFlowPostHandler:
                 application_public_access_client.access_num = application_public_access_client.access_num + 1
                 application_public_access_client.intraday_access_num = application_public_access_client.intraday_access_num + 1
                 application_public_access_client.save()
+        self.chat_info = None
 
 
 class NodeResult:
diff --git a/apps/application/serializers/common.py b/apps/application/serializers/common.py
index e8ac10809..5c60512ad 100644
--- a/apps/application/serializers/common.py
+++ b/apps/application/serializers/common.py
@@ -6,6 +6,7 @@
     @date：2025/6/9 13:42
     @desc:
 """
+import json
 from typing import List
 
 from django.core.cache import cache
@@ -19,6 +20,7 @@ from application.models import Application, ChatRecord, Chat, ApplicationVersion
 from application.serializers.application_chat import ChatCountSerializer
 from common.constants.cache_version import Cache_Version
 from common.database_model_manage.database_model_manage import DatabaseModelManage
+from common.encoder.encoder import SystemEncoder
 from common.exception.app_exception import ChatException
 from knowledge.models import Document
 from models_provider.models import Model
@@ -234,7 +236,7 @@ class ChatInfo:
             'knowledge_id_list': self.knowledge_id_list,
             'exclude_document_id_list': self.exclude_document_id_list,
             'application_id': self.application_id,
-            'chat_record_list': [self.chat_record_to_map(c) for c in self.chat_record_list],
+            'chat_record_list': [self.chat_record_to_map(c) for c in self.chat_record_list][-20:],
             'debug': self.debug
         }
 
@@ -255,19 +257,19 @@ class ChatInfo:
 
     @staticmethod
     def map_to_chat_record(chat_record_dict):
-        ChatRecord(id=chat_record_dict.get('id'),
-                   chat_id=chat_record_dict.get('chat_id'),
-                   vote_status=chat_record_dict.get('vote_status'),
-                   problem_text=chat_record_dict.get('problem_text'),
-                   answer_text=chat_record_dict.get('answer_text'),
-                   answer_text_list=chat_record_dict.get('answer_text_list'),
-                   message_tokens=chat_record_dict.get('message_tokens'),
-                   answer_tokens=chat_record_dict.get('answer_tokens'),
-                   const=chat_record_dict.get('const'),
-                   details=chat_record_dict.get('details'),
-                   improve_paragraph_id_list=chat_record_dict.get('improve_paragraph_id_list'),
-                   run_time=chat_record_dict.get('run_time'),
-                   index=chat_record_dict.get('index'), )
+        return ChatRecord(id=chat_record_dict.get('id'),
+                          chat_id=chat_record_dict.get('chat_id'),
+                          vote_status=chat_record_dict.get('vote_status'),
+                          problem_text=chat_record_dict.get('problem_text'),
+                          answer_text=chat_record_dict.get('answer_text'),
+                          answer_text_list=chat_record_dict.get('answer_text_list'),
+                          message_tokens=chat_record_dict.get('message_tokens'),
+                          answer_tokens=chat_record_dict.get('answer_tokens'),
+                          const=chat_record_dict.get('const'),
+                          details=chat_record_dict.get('details'),
+                          improve_paragraph_id_list=chat_record_dict.get('improve_paragraph_id_list'),
+                          run_time=chat_record_dict.get('run_time'),
+                          index=chat_record_dict.get('index'), )
 
     def set_cache(self):
         cache.set(Cache_Version.CHAT.get_key(key=self.chat_id), self.to_dict(),
@@ -276,15 +278,18 @@ class ChatInfo:
 
     @staticmethod
     def map_to_chat_info(chat_info_dict):
-        return ChatInfo(chat_info_dict.get('chat_id'), chat_info_dict.get('chat_user_id'),
-                        chat_info_dict.get('chat_user_type'), chat_info_dict.get('knowledge_id_list'),
-                        chat_info_dict.get('exclude_document_id_list'),
-                        chat_info_dict.get('application_id'),
-                        [ChatInfo.map_to_chat_record(c_r) for c_r in chat_info_dict.get('chat_record_list')])
+        c = ChatInfo(chat_info_dict.get('chat_id'), chat_info_dict.get('chat_user_id'),
+                     chat_info_dict.get('chat_user_type'), chat_info_dict.get('knowledge_id_list'),
+                     chat_info_dict.get('exclude_document_id_list'),
+                     chat_info_dict.get('application_id'),
+                     debug=chat_info_dict.get('debug'))
+        c.chat_record_list = [ChatInfo.map_to_chat_record(c_r) for c_r in chat_info_dict.get('chat_record_list')]
+        return c
 
     @staticmethod
     def get_cache(chat_id):
-        chat_info_dict = cache.get(Cache_Version.CHAT.get_key(key=chat_id), version=Cache_Version.CHAT_INFO.get_version())
+        chat_info_dict = cache.get(Cache_Version.CHAT.get_key(key=chat_id),
+                                   version=Cache_Version.CHAT_INFO.get_version())
         if chat_info_dict:
             return ChatInfo.map_to_chat_info(chat_info_dict)
         return None