1. Wash fish bones, fish heads and fish skins, slice ginger, cut shallots and chopped green onion for later use;
2. Put the oil in the pot, add the ginger slices and stir-fry until fragrant, then add the fish bones and stir-fry for 30 seconds, and then pour in the onion sections of cooking wine;
3. When the pot feels dry, let the water go in, bring it to a boil and simmer for 30 minutes.
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4. Put salt before the pan, sprinkle with chopped green onion, and it will be OK.