The method of cutting the whole fish into pieces is as follows: Step/Method 1. Wash the fish that has been killed and scaled, wash off the black membrane in the belly of the fish, chop off the fins, and cut off the fish. head. 2. Lay the fish flat, hold the fish body with one hand, and hold the knife close to the fish bones with the other hand to slice the meat of the fish body horizontally. 3. Use the same method to slice off the fish meat on the other side. It will look like this after the slices are done! 4. Place the fish under the fillet with the skin facing down, hold the fish with one hand, and use a knife to slice the fish diagonally into fillets about 0.5 cm thick. Chop the fish steaks into pieces about 5 cm long, and cut the fish head into two halves. 5. This is what the fish fillets will look like after being filled! 6. After the fish fillets are cut, mix the fish fillets, fish fillets and fish heads with cooking wine, starch, egg white and appropriate amount of salt respectively, and marinate for 15 minutes. Pickled fish fillets can be used to make pickled fish, boiled fish and many other fish fillet dishes.