1. Cut the bought fish from the back without washing or wetting, and take out the internal organs;
2. Take a proper amount of salt for later use;
3. Take a proper amount of salt by hand and sprinkle it evenly on the fish head;
4. Then marinate the fish belly with salt;
5. Apply salt evenly on the inner surface of the fish;
6. Turn it over again and spread it evenly on the back of the fish with salt;
7. After smearing salt on the last two sides, marinate for a week, and the preserved fish will be ready.