It is unbelievable how little people like you know or understand economics and finances: The Chinese have no other option but to buy T-Bills because if they don't then they have to sell their dollars and their currency goes up relative to the Dollar and makes the things that they sell us more expensive and they lose market share.
American companies will always be able to find new low cost regions ( ie. India, Mexico, etc.). China is not taking jobs from Americans. They are taking jobs from other low cost regions!
I doubt that you are able to understand such "complicated" concepts. You should be "investing" in lottery tickets. They are more in line with your capabilities!