The Chinese have to buy something with their soon to be worthless US dollars.

One of the biggest tricks that the bankers have used for thousands of years is tricking people into using the terms "buy" and "sell." They tricked us so well way back, that we don't even realize, anymore, that there isn't any such thing as buy and sell. It's all "trade."

If we focused on the term "trade" in all of our transactions, we just might come to realize that money is simply a trading medium. The person who focuses on the value of the things being traded rather than the value of the trading medium, will be way ahead from the start.