Put pigskin into pressure cooker and freeze for 30 minutes. Soak the skin in water for two hours before cooking to facilitate oil scraping, and add cinnamon when soaking. The treated skin needs to be boiled in cold water for 15 minutes, then taken out and soaked in cold water, and then the oil on the surface is scraped off. Cut the pigskin into thin strips and cook in a pressure cooker.

Put pigskin into pressure cooker and freeze for 30 minutes. Soak the skin in water for two hours before cooking to facilitate oil scraping, and add cinnamon when soaking. The treated skin needs to be boiled in cold water for 15 minutes, then taken out and soaked in cold water, and then the oil on the surface is scraped off. Cut the pigskin into thin strips and cook in a pressure cooker.