It usually takes a day and a night to soak fish in soy sauce. The production method is to put seafood soy sauce, star anise, cinnamon, thirteen spices and other spices into a pot, and add water to boil. After cooling, you can soak the cleaned fish for one day and one night, then wash and soak them, air them for two days, and then brush them with spices such as spiced powder and steam them.