Jellyfish skin should be soaked in water 12 hour or 24 hours. Salted jellyfish skin is covered with a lot of salt and alum, so it needs to be soaked in cold water to remove excess salt and alum, while retaining the flavor of jellyfish skin. After soaking, cut into filaments, blanch with boiling water for 10 second, and take out immediately after jellyfish silk curls. Finally, you can wash it three times with cold water.