As much as you are willing to discount that china wants nothing to do with us, remember, they are communist and the goal of communism is to rule the worl.
No the chinese are not stupid, they are very smart. After all, they helped kick our asses in Vietnam and Korea.
They may not have all the technology we do, but they make up for it with millions in their armed forces. That is a lot of people to shoot and bomb.
Remember, the greatest enemy comes from within. How many of the enemy are already here?