1. Open WeChat, search for "Beijing 12345", and click the "Public Opinion Direct" option under the official WeChat.
2. Enter the personal information interface and click the "Confirm" button.
3. Enter the personal service interface, and click the option of "health treasure coding status, and error correction will pop up".
4. Enter the complaint interface, fill in the complaint information truthfully according to the page prompts, and then click "Submit" at the bottom. After the submission is approved, the green code can be restored.