1. Open the WeChat chat window. In the WeChat chat interface, long press the chat window to clear the chat history.

2. Enter the chat window details page. When you release your finger, a "chat details" option will appear. Click to enter the detailed page of the chat window.

3. Clear the chat records in both directions. On the details page of the chat window, you can see two options: "Clear chat history" and "Delete chat". Select "Clear Chat History" and then click "Delete Chat" again to clear chat history in both directions.

It should be noted that the two-way clearing of chat records is only effective for the current chat window. If you need to clear the records of multiple chat windows, you need to operate them one by one. At the same time, it is best to check the chat record before operation to avoid data loss and misunderstanding caused by misoperation.