1.

When buying pig's trotters, ask the master to cut off the big bones and burn the hair.

2.

Wash and cut into small pieces.

3.

Longshui

4.

Remove the blood foam from the surface and put it in a pressure cooker.

5.

Peel the yam, cut it into small pieces and put it in a pressure cooker. Wash Cordyceps sinensis, cut it into small pieces and put it in.

6.

Put a proper amount of water in the pot.

7.

Add pepper, cooking wine, ginger slices, start the soup buckle, jump the buckle to vent, and add salt to taste.