Liangpi machines are mainly divided into two categories, namely square Liangpi machines and round Liangpi machines. The Liangpi made by square Liangpi machine is square. This kind of machine is fast and has high output, so it is most suitable for professional wholesale. , the disadvantage is that because it is square, customers can tell at a glance that it is machine-made cold skin, so it cannot compete with handmade cold skin. The cold skin produced by the round cold skin machine is round, exactly the same in appearance as the traditional handmade cold skin, and can be sold as handmade cold skin. This kind of machine is also divided into two categories, namely, imitation hand-made round cold skin machine (artificial sizing and manual peeling) and fully automatic round cold skin machine (automatic sizing and automatic peeling). The difference between these two machines is mainly in speed. The former is slower and requires the cooperation of two people. It can produce up to 240 pieces of cold skin per hour, that is, one piece in fifteen seconds. It is suitable for self-sufficiency or small-scale wholesale. The latter is faster and can produce four pieces of cold skin in one hour. About a hundred sheets, suitable for professional wholesale. The main things to pay attention to are: heating method, that is, coal, gas, electricity, etc. The rest does not matter.