About the issue of converting an official passport abroad into a private passport for returning home

Haha, I don’t even understand the following, it has become a recommended answer. .

European Schengen countries, yes, entry and exit times have been locked. If you do not leave the country within the original time, you will have a bad record and be illegal.

If you want to continue to stay, it is not as you said, find another unit that will last longer. . . Even if you try to find other units, they won't be able to apply for a visa for you. A person can only hold one visa at the same time.

If you want to continue to stay, you should stay in the country you are currently in, preferably the country you originally agreed to visit as your first stop in China. Then one month before departure, apply to the local immigration bureau for an extension.

If approved, you can continue your stay.

When people arrive with a Schengen visa, in principle, European countries do not allow transfer. But some people just get married like that. . .