It’s already happening. I have a friend in China and like many ex pats he had several jobs - teaching at a college, tutoring English at home and some IT consulting.
He’s back in the UK now, last summer several of his ex pat friends and colleagues were busted by investigators parachuted in from Beijing. They were detained, their visas were revoked and given a week to get out of the country. Fortunately he was in Beijing when it happened and got Chinese colleagues to clear out his stuff and any paperwork from the college, but he had to roll up all his gigs.
He’s back in the UK now, last summer several of his ex pat friends and colleagues were busted by investigators parachuted in from Beijing. They were detained, their visas were revoked and given a week to get out of the country. Fortunately he was in Beijing when it happened and got Chinese colleagues to clear out his stuff and any paperwork from the college, but he had to roll up all his gigs.