1. First, put the prepared fish head in an oil pan, fry it in medium heat until it is set, and then take it out for later use; 2. Stir-fry ginger, onion slices and star anise in an oil pan, then add light soy sauce, cooking wine, dark soy sauce, boiled water, oyster sauce, salt and vinegar, and finally put them in a fish head for 15 minutes, then take them out and put them on a plate; 3. Finally, put the prepared oil and salt cake and coriander together in the plate.