The problem with this level of analysis (and OP's) is that it assumes rational actors (that is: a "trend up" will eventually follow a "trend down" given some predictable economic factor).
The truth is China is run by an authoritarian dictator named Xi. At his command (and we recently saw) they can hose their currency to strike back against what they perceive as a slight. Xi can order the entire market to go one direction. More saliently, despite "having numbers" on the Chinese economy, no economist has been able to verify the numbers given by China and there is no public auditing process. This means (most likely) their economy is manipulated regularly and the numbers are forged.
I wouldn't touch China with a 10 foot pole. There's risk, and then there's betting for/against a guy who can just change the rules when he doesnt like what you're doing. It's like playing monopoly with a 7 year old. The second they start losing they change the rules so they get back to winning again.