1. Resume via the "Resume Chat Record" function of WeChat. Open "Settings"-"Help and Feedback" on WeChat, then select "Repair chat history", wait a while, and then resume.

2. Contact WeChat customer service. You can ask for help to recover the data through the "WeChat Security Center" in WeChat official account or the "Contact Customer Service" page in WeChat official website.

3. If you have the habit of backing up WeChat chat records, you can use backup software to restore them.