The method of making pig's trotters and soybean soup is as follows: 1. Prepare all the ingredients: two green onions, two pieces of ginger, 10 peppercorns, an appropriate amount of white wine, an appropriate amount of salt and pepper, an appropriate amount of black pepper, and 2 grams of salt.

2. Put an appropriate amount of water into the pot, add the pig's trotters, onion, ginger, pepper and white wine and bring to a boil.

3. Take out the pig's trotters and rinse them with cold water. Discard the blood in the pot.

4. Pour in the newly blanched pig's trotters again, put three large bowls of water into the pot, cover the pot and simmer.

5. Pour in the soaked soybeans after half an hour.

6. Continue to cook for an hour and a half and then add appropriate amount of salt.

7. Add appropriate amount of pepper and salt.

8. Add appropriate amount of black pepper.