Exercise:

1. After peeling ginger, wash and slice it, with a thickness of about 5 mm, and cut off the root of the column or split it, so that ginger will not be tough. Put a little oil and a little salt in the pot.

2.2 days later, buy pig's trotters, singeing, chopping, splashing, cooling the river to remove fishy smell, and drying.

3. Boil the eggs in cold water, and then shell them.

4. Put vinegar and ginger together. After boiling, add boiled eggs. Simmer for 20 minutes, turn off the fire, leave it for 2 days, and take it out after boiling. On the third day, put the processed trotters and cook for 5 minutes. Turn off the fire.

5. Leave it for 1-2 days, then boil it and pour out the pigskin to eat.