
What stops a re-install?
Simple, if you are lucky, you are warned, possibly twice.
Less lucky or if a multiple offender you lose all access to the Internet.
if you are less lucky still you lose, access to travel in country, access to university and/or any chance at getting a job outside off a sweatshop. BTW: they also apply this kind of pressure to relatives.
If the CCP really doesn't like you they throw you into a labor camp until the shoot you and sell your organs to some rich capitalist., then bill the cost of the bullet to any surviving relatives.
Many if the mostly free West just can't seem to grasp how much of a price is paid by those who choose to challenge the CCP in country.