Just press the sealing machine by hand. It depends on the material of the bag. If it is nylon composite, there are requirements for the model of sealing machine. If it is made of other materials, it will be fine. . . It also depends on the size of jiaozi packaging bag, and whether it will be made into larger bags in the future, because the sealing length of large-sized bags is longer. For example, 500 grams is within 20CM, 1000 grams is preferably within 25CM, and 2.5KG is greater than 30 CM.