1. Add green onions, ginger, cooking wine to pig's trotters, and boil blood foam
2. Heat oil in a pot, add rock sugar and fry to make a jujube-red color, add trotters, stir-fry evenly, add green onion, ginger, star anise, cinnamon, bay leaves, light soy sauce, soy sauce, salt, soaked soybeans, stir-fry evenly
3. Add water to soak the trotters
4. Transfer to a casserole, cover and simmer for 1 hour.