Chinese American food reflects the history of ... "ch'ao mien," meaning "stir-fried noodles." Common add-ins include green onion, carrot, cabbage, bean sprouts, mushrooms, and light soy sauce.
It might not be traditional, but I also like to add a splash of Chinese vinegar to the sauce, just before mixing it with the noodles and vegetables. There are several types of Chinese bean paste ...
Apart from the mung bean noodles and sesame dressing, there are no rules for the other ingredients to use, although you should always have a good mix of colours. I used carrot, cucumber ...