1. Rinse the pork knuckle and divide the pork knuckle into four parts: skin, lean pork, pork bones and pork fat
2. Then blanch the skin, pork lean meat and pork bones. You can add an appropriate amount of green onion and ginger together, and then use a knife to scrape off the fat on the skin.
3. Then cut the skin into thin strips, put it in the pot, add 500 grams of water and salt
4. Then put the blanched lean meat and bones into the pot, cook the beans in an electric pressure cooker, and prepare a mold for oiling
5. Cook the meat and soup, remove the grease on the surface, and pour it into the mold
6. Put it in the refrigerator for 1 hour, it will solidify into cubes and pour it on the chopping board; then cut into cubes and serve with the sauce
