What happens when you go through the formalities of traveling abroad and don't return to China on time when it expires?

hello! If you stay in a foreign country illegally within six months after your visa expires, you will be sent back to China and even fined if you are caught by the foreign immigration bureau! If the visa expires and you remain in a foreign country illegally within one year, you will be regarded as an illegal immigrant. You will be arrested by the Immigration Bureau and sent back to China, and you will be restricted from entering the country for at least two years!