1, preliminary soaking: soak the dried shark fin in clear water for about 2 to 5 hours, depending on the shape and size of the shark fin.

2. Cleaning: After soaking, gently remove the sand and impurities on the shark fin surface with a knife or a soft brush.

3. Cooking: Put the cleaned shark fin into the pot, add clean water and cook it with low heat until it is soft. The cooking time is about 1 to 3 hours. This process may require turning the shark fin to ensure uniform heating.

4. Dry or soak again: soak the cooked shark fin in cold water, then take it out and gently press it on clean gauze to dry it, or soak it in clear water again to keep it soft.

5. It is best to use non-ferrous materials such as stainless steel or porcelain jars when making shark fins, so as to avoid the discoloration or deterioration of shark fins caused by chemical reactions. In addition, before cooking, shark fins should be classified according to their hardness and treated separately to ensure that shark fins can be fully developed.