As I said before, there are so many other countries that have similar or even lower electricity prices than China and miners will eventually move there or simply go underground in China.
We also know that youtube, twitter and some other platforms (who are now banning and censoring regular people btw) are banned in China but they use this services with vpn, and government can't do anything about that.
I heard latest news that Iran is also banning Bitcoin mining during this summer season to save electricity and reduce chances for restrictions, but they will continue as normal after that in autumn.
Chinese electricity is not cheapest in the world as you can see, but they are the source of asic miner chip production, that will still continue normally and easiest thing for miners would be to move to other neighbouring countries.
Even South American countries like Mexico and Argentina are very interesting for bitcoin mining but you can pick any country from list below showing prices for September 2020 for kWh per USD:
https://www.globalpetrolprices.com/electricity_prices/