2. Heat the oil to 60% heat, add croaker and fry until golden brown on both sides, add ginger, onion, garlic, dried pepper, pepper and star anise, stir well, add appropriate amount of water, seafood sauce and cooking wine and stew for 30 minutes.
3. After the soup is dry, add half a teaspoon of vinegar, 1 teaspoon of salt and half a teaspoon of chicken essence and mix well. Serve and sprinkle with chopped green onion.