Thaw the brine first. (Production of brine, see: https://www.xiachufang.com/recipe/101682233/)
Use a knife to remove the fat and oil from the skin, and clean the residual hair on the skin.
Wash it up and wash it with water.
After the brine is boiled, put in the pigskin.
Add a little soy sauce, salt and water (water submerged pigskin), turn the water and turn to low heat, cook for 30 minutes.
Turn off the fire, remove the pigskin, and cut into the shape you like.