1, hot water blanching: first boil the water, then blanch the ready-to-eat shark fin in the water for 5~ 10 minutes, and finally rinse it with clean water. This method can effectively heat the ready-to-eat shark fin to a suitable temperature, while maintaining its taste and nutrients.

2. Microwave heating: First, put the ready-to-eat shark fin into a bowl that can be microwave, then cover it with plastic wrap, and heat it in a microwave oven for 2-5 minutes with high or medium fire, and take out the ready-to-eat shark fin. When the instant shark fin is heated by microwave oven, attention should be paid to the control of heating time and temperature, so as to avoid overheating leading to poor taste or loss of nutrients.