Ni hao! Huanying guanlin!
I lived in China from 2004-2008. I taught English at a university in the NW. I loved it, and miss China a lot.
I sympathize with you about losing weight in China. It was not easy for me, and while I started my healthy lifestyle changes there, most of the weight came off once I moved back to the US and was able to more accurately track calories.
First of all, looking at your stats, you're already in a "normal" weight range. I don't say this to discourage you from reaching your goals, but to acknowledge that many people find it more difficult to lose weight the closer they are to their goal. I would suggest posting on the Featherweights forum to get some advice from the experts there.
Specifically to China, I would suggest cooking for yourself as much as possible. I found it SO easy to eat out (cheap and yummy and fast!) but there's a lot of oil and fat used, and you can't control that. You can control what you make and eat at home (as many veggies as possible). Also, watch the rice - rice servings can be huge in restaurants, perhaps 2 cups of cooked rice, which is a lot of calories.
Good luck!