diff --git a/examples/async_usage.py b/examples/async_usage.py
index c73a148..0e87b6b 100644
--- a/examples/async_usage.py
+++ b/examples/async_usage.py
@@ -209,47 +209,47 @@ async def get_chat_records():
 
 async def main():
     """Run all examples."""
-    # print("=== Simple Chat ===")
-    # try:
-    #     await simple_chat()
-    # except Exception as e:
-    #     print(f"Error: {e}")
+    print("=== Simple Chat ===")
+    try:
+        await simple_chat()
+    except Exception as e:
+        print(f"Error: {e}")
 
-    # print("\n=== Streaming Chat ===")
-    # try:
-    #     await streaming_chat()
-    # except Exception as e:
-    #     print(f"Error: {e}")
+    print("\n=== Streaming Chat ===")
+    try:
+        await streaming_chat()
+    except Exception as e:
+        print(f"Error: {e}")
 
-    # print("\n=== Chat with Context ===")
-    # try:
-    #     await chat_with_context()
-    # except Exception as e:
-    #     print(f"Error: {e}")
+    print("\n=== Chat with Context ===")
+    try:
+        await chat_with_context()
+    except Exception as e:
+        print(f"Error: {e}")
 
-    # print("\n=== Get Histories ===")
-    # try:
-    #     await get_histories()
-    # except Exception as e:
-    #     print(f"Error: {e}")
+    print("\n=== Get Histories ===")
+    try:
+        await get_histories()
+    except Exception as e:
+        print(f"Error: {e}")
 
-    # print("\n=== Get App Analytics ===")
-    # try:
-    #     await get_app_analytics()
-    # except Exception as e:
-    #     print(f"Error: {e}")
+    print("\n=== Get App Analytics ===")
+    try:
+        await get_app_analytics()
+    except Exception as e:
+        print(f"Error: {e}")
 
-    # print("\n=== Multiple Requests (Concurrent) ===")
-    # try:
-    #     await multiple_requests()
-    # except Exception as e:
-    #     print(f"Error: {e}")
+    print("\n=== Multiple Requests (Concurrent) ===")
+    try:
+        await multiple_requests()
+    except Exception as e:
+        print(f"Error: {e}")
 
-    # print("\n=== Chat with Variables ===")
-    # try:
-    #     await chat_with_variables()
-    # except Exception as e:
-    #     print(f"Error: {e}")
+    print("\n=== Chat with Variables ===")
+    try:
+        await chat_with_variables()
+    except Exception as e:
+        print(f"Error: {e}")
 
     print("\n=== Get Chat Records ===")
     try:
diff --git a/examples/basic_usage.py b/examples/basic_usage.py
index a627160..da917ca 100644
--- a/examples/basic_usage.py
+++ b/examples/basic_usage.py
@@ -99,27 +99,86 @@ def get_histories():
             print(f"Error: {e}")
 
 
+def delete_chat_item():
+    """Delete a chat item (record) example."""
+    with ChatClient(api_key=API_KEY, base_url=BASE_URL) as client:
+        app_id = os.getenv("APP_ID")
+        chat_id = os.getenv("CHAT_ID")
+        
+        # First, get the chat records to find a contentId to delete
+        try:
+            records = client.get_chat_records(
+                appId=app_id,
+                chatId=chat_id,
+                offset=0,
+                pageSize=10
+            )
+            records.raise_for_status()
+            data = records.json()
+            
+            if data.get('data', {}).get('list'):
+                # Get the first record's dataId as contentId
+                content_id = data['data']['list'][0].get('dataId')
+                
+                if content_id:
+                    print(f"Deleting chat item with contentId: {content_id}")
+                    print(f"Using appId: {app_id}, chatId: {chat_id}")
+                    try:
+                        response = client.delete_chat_record(
+                            appId=app_id,
+                            chatId=chat_id,
+                            contentId=content_id
+                        )
+                        print(f"Response status: {response.status_code}")
+                        print(f"Response text: {response.text}")
+                        response.raise_for_status()
+                        print("Chat item deleted successfully!")
+                    except Exception as delete_error:
+                        print(f"Delete error details:")
+                        print(f"  Error type: {type(delete_error).__name__}")
+                        print(f"  Error message: {delete_error}")
+                        # Try to get response details if available
+                        if hasattr(delete_error, 'response'):
+                            print(f"  Response status: {delete_error.response.status_code}")
+                            print(f"  Response text: {delete_error.response.text}")
+                        raise
+                else:
+                    print("No contentId found in the record")
+            else:
+                print("No chat records found to delete")
+        except Exception as e:
+            print(f"Error: {e}")
+            import traceback
+            traceback.print_exc()
+
+
 if __name__ == "__main__":
-    print("=== Simple Chat ===")
-    try:
-        simple_chat()
-    except Exception as e:
-        print(f"Error: {e}")
+    # print("=== Simple Chat ===")
+    # try:
+    #     simple_chat()
+    # except Exception as e:
+    #     print(f"Error: {e}")
 
-    print("\n=== Streaming Chat ===")
-    try:
-        streaming_chat()
-    except Exception as e:
-        print(f"Error: {e}")
+    # print("\n=== Streaming Chat ===")
+    # try:
+    #     streaming_chat()
+    # except Exception as e:
+    #     print(f"Error: {e}")
 
-    print("\n=== Chat with Context ===")
-    try:
-        chat_with_context()
-    except Exception as e:
-        print(f"Error: {e}")
+    # print("\n=== Chat with Context ===")
+    # try:
+    #     chat_with_context()
+    # except Exception as e:
+    #     print(f"Error: {e}")
 
-    print("\n=== Get Histories ===")
+    # print("\n=== Get Histories ===")
+    # try:
+    #     get_histories()
+    # except Exception as e:
+    #     print(f"Error: {e}")
+
+    print("\n=== Delete Chat Item ===")
     try:
-        get_histories()
+        delete_chat_item()
     except Exception as e:
         print(f"Error: {e}")
diff --git a/fastgpt_client/async_client.py b/fastgpt_client/async_client.py
index 4b3ad03..1535e5b 100644
--- a/fastgpt_client/async_client.py
+++ b/fastgpt_client/async_client.py
@@ -495,8 +495,9 @@ class AsyncChatClient(AsyncFastGPTClient):
         Returns:
             httpx.Response object
         """
-        params = {"appId": appId, "chatId": chatId, "contentId": contentId}
-        return await self._send_request("DELETE", "/api/core/chat/item/delete", params=params)
+        # Try using JSON body first (some APIs prefer this for DELETE)
+        data = {"appId": appId, "chatId": chatId, "contentId": contentId}
+        return await self._send_request("DELETE", "/api/core/chat/item/delete", json=data)
 
     async def send_feedback(
         self,
diff --git a/fastgpt_client/client.py b/fastgpt_client/client.py
index cfb7f03..14bef4e 100644
--- a/fastgpt_client/client.py
+++ b/fastgpt_client/client.py
@@ -431,8 +431,9 @@ class ChatClient(FastGPTClient):
         Returns:
             httpx.Response object
         """
-        params = {"appId": appId, "chatId": chatId, "contentId": contentId}
-        return self._send_request("DELETE", "/api/core/chat/item/delete", params=params)
+        # Try using JSON body first (some APIs prefer this for DELETE)
+        data = {"appId": appId, "chatId": chatId, "contentId": contentId}
+        return self._send_request("DELETE", "/api/core/chat/item/delete", json=data)
 
     def send_feedback(
         self,
diff --git a/tests/test_chat_client.py b/tests/test_chat_client.py
index b4e4e57..3bc78fa 100644
--- a/tests/test_chat_client.py
+++ b/tests/test_chat_client.py
@@ -485,7 +485,7 @@ class TestChatClientDeleteChatRecord:
         call_args = mock_send.call_args
         assert call_args[0][0] == "DELETE"
         assert call_args[0][1] == "/api/core/chat/item/delete"
-        assert call_args[1]['params'] == {
+        assert call_args[1]['json'] == {
             "appId": "app-123",
             "chatId": "chat-123",
             "contentId": "content-123"