The mislaid sauce of beef with three sauces is sour. Dry yellow sauce has a strong smell of soy sauce, and beef will be sour if it is not cooked well. Three sauces refer to braised soy sauce, bean paste and red fermented bean curd. The process of three sauces refers to: soaking, sauce stewing and sauce soaking. Sauced beef pays attention to three sauces. Three sauces are understood from two aspects. On the one hand, the combination of the three sauces makes the sauce meat layered and rich in taste. On the other hand, it refers to the cooking technique, which uses three different sauces to treat beef.