Though to be honest I don't understand how bitcoin can be used for getting money out of the country. Who would be willing to accept onshore CNY in payment for bitcoin in volumes if everyone is trying to move out?
And with the CNY, you can buy real goods. And with those real goods, you can export them. And with those exports, you can sell them for foreign currency.
So as long as they're running an export-oriented economy, it's going to be very hard to fundamentally stamp out crypto as an option. This mostly strikes retail traders / buyers.
I was thinking of two separate transactions with two separate parties: (BTC -> CNY, hidden as gift or loan) then (CNY -> goods, perfectly legal and normal).
I suspect the recent crackdown is more related to a fear of uncontrolled capital flight due to regulatory changes and anticipated slowdown of the economy.
I'm guessing it has to do with preventing people from moving wealth out of the country.