How long will foreigners be detained in China if their visas expire and they want to be repatriated? Do you still need to be detained in their country? How can he come to China?

The detention time of foreigners in China depends on the communication between the Immigration Bureau and foreign embassies, and their detention after returning to China depends on local laws. You can apply for a visa here, unless the Immigration Bureau decides to ban entry within a few years, but the difficulty of applying for a visa will increase and the conditions will be stricter. After all, you have a bad record. . .