They will lock the stable door after the horse has bolted. Too little and too late, as it were! Over at least the past decade, foreigners already here have become street-wise. I've heard of a Ghanaian who married a Chinese girl to ensure he can stay in China visa-wise. Not for love!
They've been slow on the uptake, and will now have to suffer the consequences.
But I wouldn't feel sorry for them. They don't deserve our sympathy. For one thing they're racist!
They still don't realize that the illegal aliens here are mainly here because they've been offered jobs by shady Chinese. Stop the Chinese side offering jobs that permit foreigners to work on wrong visas, and the problem will be largely solved. It could be stopped easily by fining the shady Chinese employers, agents and recruiters tens of thousands of Yuan. Talk about thick! Oh dear! They've a long way to go mentally to match their Western counterparts!