1. Practice 1: Prepare materials. Pig's trotters, onion, ginger, cooking wine, rock sugar, pepper, star anise, fragrant leaves, salt and soy sauce. Chop pig's trotters into small pieces, soak them in blood, change the water several times and rinse them clean; Slice ginger, cut onion and pepper, and then prepare pepper granules, fragrant leaves, star anise and cinnamon; Put pig's trotters in a pot with cold water, add 3 tablespoons of cooking wine, blanch, remove earthy smell and blood foam, wash and drain; Add an appropriate amount of oil to the pot, stir-fry shallots, ginger, garlic, pepper, cinnamon and star anise with low fire, and then stir-fry pig's trotters; Add appropriate amount of soy sauce, rock sugar and salt, stir-fry evenly, pour appropriate amount of water, boil over high fire, pour into electric pressure cooker, cover it, and press the "ribs" button; When the float of the electric pressure cooker falls naturally, pour the pig's trotters and soup into the wok to collect the juice, and the soup can be taken out after it is sticky.

2. Practice 2: Prepare materials. Pig's trotters, ginger, cooking wine, onion, garlic, soy sauce, rock sugar. Add water to the pot, put pig's trotters in cold water, boil, skim the floating foam and drain; Rinse and cool pig's trotters with cold water, and carefully clean the stolen goods; Re-prepare a pot of clean water, and put cooking wine, ginger slices, garlic cloves, star anise, cinnamon and fragrant leaves into the pot to boil; Put the trotters and chives in, and the water will flow through the trotters. Cover the pot, simmer for about an hour, and turn off the fire; Clip out all the ingredients except the trotters and keep the soup. Add rock sugar and braised soy sauce, mix well, bring to a boil over high heat, and continue to cover the pot and stew for about 1 hour.

3. Practice 3: Prepare materials. Pig's trotters, green vegetables, mushrooms, black fungus, kelp, dried peppers, ginger, rice wine, fresh vegetables, carved wine, onions, salt, garlic, cinnamon and star anise. Boil water in the pot, add pig's trotters, open the lid and boil out floating foam; Boil the water in the pressure cooker, add onion, ginger and garlic seasoning, and then put the seasoning into the pressure cooker; Pour a proper amount of carved wine; Add mushrooms, black fungus and a bowl of rice wine to boil; Removing floating foam; Cover the pot and stew for 20 minutes; Finally, open the lid and blanch the sea belt and small vegetables; Then add salt and fresh vegetables.