First, take a clean oil-free pan, put shark's fin and clear water (water can't pass shark's fin), soak for 24 hours, then take it out and drain it. When soaking, change the water twice to remove impurities and dirt from shark fins.

Please click to enter a picture description.

Then, take another clean pot and add shark's fin and enough water. After the fire boils, turn to low heat, cover the pot and cook for 4 hours, then turn off the fire and let it cool. Before cooking, wash the shark's fin with running water, so as to remove its lime smell and the shark's fin will swell again.

Please click to enter a picture description.

Then, take out the cooled shark fin, soak it in clear water to remove the colloid and sediment in the shark fin, and rinse it again. Add 2 liters of water, shark's fin, onion 10g, ginger 10g into the pot, cover it and cook for 5 hours, then turn off the fire.

Please click to enter a picture description.

Then, take out the shark fin, wash it again, remove all sundries outside the fin needle, and drain the water. At this time, the shark fin has become filiform. Add some water, onion, ginger, a little white wine and shark's fin to the pot. After the fire boils, remove the shark's fin, then change the water in the pot into light salt water, add the shark's fin and boil it with high fire, and then season it at will (the shark's fin cooked in light salt water will shrink slightly).

Please click to enter a picture description.

Then, put a piece of cloth or lotus leaf on the steamer, put shark's fin on the cloth, put the steamer into the steamer, and steam it on medium heat until the fin needle can be broken with nails.

Please click to enter a picture description.

Finally, take another pot, add shark's fin and enough water, reduce the heat to continue cooking 1 hour, turn off the fire and cover the pot to cool.

Please click to enter a picture description.