2. Use a rice cooker to boil water for half a pot, and put the shark fin with a lemon or an orange into the pot to make it smell fishy.

3. After boiling for about 20 minutes, turn off the fire, turn on the heat preservation system, let the shark fin stay in the rice cooker for about three hours, then soak it in clean water for two hours, and it will be ready for use.

4. If the shark fin is thin, the water time can be shortened to half an hour.

5. The main procedures for foaming dried shark fins are: soaking, stewing and stewing. According to the thickness, tenderness and products of different shark fins, the methods, time and duration of puffing are also different.