It's not so much about something the Chinese do to us as it is what we are doing to ourselves. The Chinese are just facing the reality of a devaluing dollar. They can't stop it, but they can make the best possible choice concerning their existing dollar holdings. If they get it out of dollars and into tangible assets they can try to protect what they have. Not a bad strategy for anyone.
Selling Low and Buying High? This is awesome. Single-handedly destroying hundreds of billions of accumulated wealth that they’ll never see again.
All I know is that I’m still long on the USD. :D Dollar drops again, I can buy more USD.