When it comes to Chinese food, the best method for reheating is honestly probably going to be the oven or the stovetop, depending on what you have in your leftovers.
Chinese food can carry all kinds of foodborne illness-causing bacteria if not stored and reheated properly, just like any mixed-ingredient takeout food.
Reheating Chinese food is one of the preferred ways to get your food back to its original glory because many of the dishes are either breaded and fried or sauteed and grilled.