How do Chinese restaurants make such a large variety of food so fast? Is it all pre made and then heated or different sauces mixed in with different meats and veg?

中国餐馆怎么能这么快做出这么多种类的食物呢?是预先做好然后加热,还是用不同的酱汁混合不同的肉类和蔬菜?