The investigation order can't find the chat record of WeChat, because Tencent can save the user's chat data, so it can't retrieve the chat record. The investigation order can only be used to retrieve the registration information of WeChat users, WeChat official accounts, WeChat applets, or account transfer records paid by WeChat. The investigation order needs to be sent to the lawyer by the court, and the lawyer will go to Tencent with the transfer order, and the investigation results will be directly mailed to the court judge.