Cold beef is made with front legs, because the beef in this part has low fat content and high protein content, which belongs to lean meat. In addition, the beef will not burn after being cooked, and it is rich in flavor, so it is suitable for making cold beef. Beef (pinyin: niú rê u) refers to the meat obtained from cattle and is one of the common meat products. Sources can be cows, bulls and heifers. The muscle part of cattle can be cut into steak, beef pieces or beef tendon, and can also be mixed with other meats to make sausage or blood sausage. Other edible parts include ox tail, ox liver, ox tongue, ox louver, ox pancreas, ox thymus and ox.