According to the state-run news outlet Global Times, as of May this year, the government had blocked 11.14 million people from flights and 4.25 million from taking high-speed train trips.
 
Punishments are not clearly detailed in the government plan, but beyond making travel difficult, are also believed to include slowing internet speeds, reducing access to good schools for individuals or their children, banning people from certain jobs, preventing booking at certain hotels and losing the right to own pets.
 

Imagine if this was rolled out in the US (and it's a distinct possibility).
Police dressed riot gear throwing flashbangs into your home, and smashing down your door. "We're here for your cats!"