You've got an enemy!
1. Just like the US politicians (and Military), or even more so, the Chinese regime needs an enemy. The question is who?
2. Chinese regime sees American system and values as a threat.
3. Chinese regime thinks that the Russians share their values. IMHO, this is the most dangerous perception as Russians can stab you in the back in a split of a second.
4. Chinese regime does not think any other country worthy of their enemy. This is the 2nd most dangerous one as the Chinese arrogance can push them into a alliance.
The only viable arsenal against US is the nuclear weapons, so the Chinese regime is preparing the population for a US counterattack that (use your imagination here).