Popular stir fry sauces in Chinese cuisine include oyster sauce, hoisin sauce, and black bean sauce. Oyster sauce, made from oyster extract, adds a rich umami flavor to dishes like beef and broccoli. Hoisin sauce, a sweet and tangy sauce made from soybeans and spices, is often used in dishes like chow mein. Black bean sauce, made from fermented black beans, imparts a unique, earthy flavor to dishes like stir-fried beef.