When 肉 is used alone without specifying the animal, it usually means pork (猪肉 zhūròu) in China. Other meats: 牛肉 (niúròu, beef), 鸡肉 (jīròu, chicken), 羊肉 (yángròu, lamb).
culture
Pork is by far the most consumed meat in China. China produces and consumes about half of the world's pork.