Method 2: Buy a piece of fat pork with skin, heat the wok, put the fat into the wok, simmer, and constantly wipe the fat into the wok until the fat turns black, and then wash the wok.
Method 3: Sprinkle salt in the pot, fry the salt until yellow, then add water and oil to the pot and bring it to a boil.
Method 4: Wipe the pan surface with yellow sand, coal ash and straw ball water, remove the ash white material from the pan surface, then heat the pan, add cooking oil until the oil smokes, then wipe the pan surface with this, and wash it with clear water after the ceasefire.