Excuse me, how to solve the problem of expired Schengen visa for German tourists? How to return to China?

If there is not much time limit, there is actually no problem in leaving the country. If you are fined, you can only admit the punishment. Of course, it may affect the next visa application.

You can also go to the local immigration office to apply for a certificate of delay in leaving the country, and you need to explain the reasons for the delay (reasonable reasons are very important). If the immigration department agrees, the customs will stamp it when you pass the customs, and then send the certificate to the immigration department.