Some Chinese recipes do have sugar added to them, though not all do. General Tso's Chicken has lots of sugar added to the sauce, for instance. But not all do.
I like to stir-fry pork Szechwan style at home with sesame oil, those little red peppers, onions, carrots, broccoli, celery, peanuts, and soy sauce. It's very good over rice. You can also do this with beef or chicken. It's tasty. ♡