Chinese food is naturally lower in calories than most ethnic foods. The menus involve lots of lean meats, seafood, and fish. There are lots and lots of vegetables.
The best part of Chinese recipes is that almost anything can be substituted for ingredients you either don't like or are bored with. For example - substitute beef for pork, crab for shrimp, or turkey for chicken. You instantly have two recipes for every one that's written.
Now, mix things up more by buying stir-fry veggie mixes or creating your own. Use three kinds of bell pepper to add color and interest.
Be sure to use low-sodium soy sauce to keep water retention to a minimum as that can slow down weight loss results and cause bloating.
If you can't find Hoison sauce in your local supermarket's Asian section, you can substitute low-cal catsup.
Be sure to experiment with recipes when dieting. It keeps things interesting and that helps you stay on track!