1. Wash onion and ginger and change knives.
2. Wash the trotters and cut them into small pieces.
3. Wash the soybeans for later use.
4. Boil the water in the pot, add the onion and ginger cooking wine, cook for a while, pour the trotters, cook for 3-5 minutes after the pot is boiled, remove and rinse.
5. Pour the trotters and soybeans into the casserole.
6. Add onions and ginger slices.
7. Pour clean water, stew for about 1.5 hours, add salt, and oil flower and floating foam will be produced in the middle. Skim it with a small spoon and stew for half an hour.
8. Finished product drawing.