Having to produce original documents won't stop use of fake degrees. Nobody seems to care here anyway.. People will just use original copies of fake documents. Many Chinese have fake credentials anyway, they can't really expect foreigners to have real degrees. As for verifying degrees, the Chinese will never do that, they are far too lazy. The PSB will do nothing. they only care if you have the correct visa, degree documents are of no concern to them. Your crusade to stop fake degrees is a waste of time.