All he has to do is to continue to stand by the false figures he signed off on. After all, China isn't allowing any US authority access to the documentation in China necessary to prove deceit. China considers such documentation to be "State secrets."
The PCAOB is demanding the right of inspection and the SEC is suing auditors for not providing such. Either China is going to have to back down or the US is going to have to delist all Chinese companies.
If the Chinese do back down and allow US authorities access - Toups had better never return to the US. But for now he's safe.