1. Rinse the dried sea cucumber directly with tap water to remove a little dust on the surface.

2. Soak the sea cucumber in cold purified water for about 24 hours, changing the water twice in the middle, until the sea cucumber becomes soft.

3. Cut the soaked sea cucumber lengthwise from the abdomen and remove the teeth at the front of the sea cucumber, which is the spit.

4. Add an oil-free pot to the pure water, cover the pot and bring to a boil. Change to medium heat for 35-50 minutes. Turn off the heat, cover the pot, and simmer over low heat until it cools down naturally.

5. Change to fresh, cool purified water, soak for about 48 hours, and change the water 2-3 times in between. After the hair is done, you can eat it.