Personally, and this is just me, but investing in China is only wise if it’s a small part of your portfolio. China’s economy is booming in large part because they are buying dollars and euros to keep their currency artificially low. The low currency causes a trade imbalance where they export far more than they import, which gives an influx of cash to build their infrastructure. The US is not in danger of defaulting on the loans for a number of reasons, not the least of which is that they can print money, but as you probably know (and if you don’t, you should be even considering this investment) several EU member nations are on the brink of economic collapse, with one, Greece, just having to have been bailed out.
In short, China’s economy is being held up by the house of cards of international economics. As long as they can keep borrowing money, they can keep growing. It’s in China’s interest, therefore to encourage a cheap dollar as they can borrow with lower interest rates. But that means that that will further the trade imbalance. Make sense?