Citing BIll again (without going back):
Xi uses surveillance technology, not just cameras, but comprehensive monitoring of its citizens, to maintain party control.
My limited understanding of China suggests there is a strong tradition of conformity by the population to their rulers, provided there is food to eat, stability, no bandits and an element of justice. With the dramatic increase in urbanisation, where individuals can become anonymous, China has focused on technology to reinforce existing controls, e.g. the "internal" passport. Controlling movement is another, potent as most traffic is the state-provided bus and train networks. Just a few thoughts.