Much modern chemistry is done in China. You can see this by looking at the journals. But Chinese is an extraordinarily difficult language to learn. Consider German, which at least gives you access to much of the old, pre World War I chemical literature. If you can take 'scientific German', so much the better, since it's targeted at the sort of language used in science. Also, you are only really concerned with German --> English, not the other way 'round.
Dangerous Bill