1. Scrape the pigskin first, rinse off the grease on the surface, boil it with cold water, take it out while it is hot, cut it into thin strips, and wash off the floating foam on the surface for later use.

2. soak soybeans in advance.

3. Add pigskin and soybeans to the pressure cooker.

4. Add onion, ginger, pepper and star anise soy sauce to the pot, and add appropriate amount of oil.

5. Add a proper amount of boiling water to the pot without touching the bottom of the pot.

6. Cover the lid and set the tendon stewing program, with the pressure set to 80 and stewing for 30 minutes.

7. When cooking is finished, there is no pressure to open the lid in the pot.