How to renew the European tourist visa?

Under normal circumstances, there is no way to renew a tourist visa. If you don't have sufficient reasons, the Immigration Bureau will not accept your application, and the reason why you want to renew it will be indicated in the remarks.

European Schengen visa, France, Italy and Germany, these three countries are the most stringent, so you must have planned it when you applied in China. You can change it at will unless there is a very important reason, such as accidental injury, a certificate issued by the hospital there, or a report issued by the police station and the French Embassy in China.