2-month automatic extension: Starting on March 4th, all foreigners who are currently in China - regardless of visa types, such as tourist visa, business visa, etc - have been extended 60 days automatically. i.e. If your visa shows that it will expire on April 15th, then you can leave on June 14th(+60 days) at the latest. Airport immigration officers will not give you any trouble leaving China.

As long as it is the coronavirus period, this 60-day grace period for foreigners' visas will be in effect.

This does not apply to you if you are outside of China. If your visa has expired and you're outside of China, you need to apply for a new visa.