2. Soybeans should be soaked for half a day in advance. Some supermarkets sell pig's trotters, and some markets sell them, but you must ask a market master to cut them. Our own knives are not good. Wash pig's trotters, blanch for 2-3 minutes before rinsing.
3. Add oil to the pot. When the oil is hot, add ginger slices, onion segments, star anise and pig's trotters and stir fry, then add soy sauce and stir fry the cooking wine.
4, add water, don't pig's trotters, and the fire will boil. Then turn to low heat and burn for 20 minutes.
5, add soybeans to boil, add some sugar, salt. Then simmer until the trotters are rotten. If it is not cooked thoroughly, you can add some boiling water to continue simmering. Soybeans must also be cooked!
6, add monosodium glutamate, chopped green onion, out of the pot.