2. Soak in cold purified water for about 24 hours, and change the water twice in the middle until the sea cucumber becomes soft.
3. Cut the soaked sea cucumber longitudinally from the abdomen and remove the teeth at the front end of the sea cucumber, that is, the sand mouth.
4. Add an oil-free pan to pure water, cover the pan and boil. Switch to medium fire for 35-50 minutes. Turn off the fire, cover the pot, and simmer for natural cooling.
5. Change to fresh and cool purified water, soak for about 48 hours, and change water 2-3 times in the middle. After the hair, you can eat it.