2. Boil half a pot of water in an electric rice cooker, and add a lemon or an orange to the shark fin 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, and then soak it in clear water for two hours, and it can be used.

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

5. The main processes of foaming dried shark fin are: soaking, stewing and stewing. According to the thickness, tenderness and products of different shark fins, the method, time and duration of puffing are different.