The difference between the two lies in the control of oil temperature.

Oiling is a process in which dry ingredients are put into a large oil pan and heated to expand in volume and then absorb water, making the texture soft and swollen. Oil hair is suitable for animal dry food raw materials rich in collagen, such as belly, tendon, fish skin, fish maw, etc. Oil hair generally goes through six stages: washing and drying - cold oil in the pot - warm oil for hair - hot oil for hair - hot oil for hair - soaking in alkaline water - rinse with water.

Fried food is heated in high oil temperature to increase its volume several times to achieve the purpose of puffing. Hot frying involves taking out the dry ingredients and draining the oil after a long period of heating.