Soak the sea cucumbers in water for about 3 to 5 days (depending on their sizes), and change the water at least twice or three times every day. When the weather is hot,please conduct above procedure in fridge(0-8℃).
Put them in boiling water and boil for about 20 minutes. Turn off the heat, cover the vessel, and allow the water to cool down. If the cucumbers are too large, repeat the previous steps 1 or 2 times until the sea cucumbers become soft.
Remove the sea cucumbers from the water and cut them open to remove internal organs and impurities. Rinse them and cut them into pieces (according to cooking requirements), and then set aside for later use.