1. Call the consumer complaint hotline directly by telephone or Internet phone to provide information such as name, contact information, complaint content and complaint object.

2. Submit the complaint information on the official website of Mi Xue Bing Cheng, fill in the content, object and reason of the complaint, and upload relevant evidence photos or videos.

3. Submit the complaint information on the official WeChat platform of Mi Xue Bing Cheng, select the complaint type and upload relevant evidence photos or videos.

4. If you encounter serious problems, you can report to the local market supervision department. In short, complaints can be fed back in time through these channels to protect the legitimate rights and interests of consumers.