Clean the fish and then cut a small line to separate the thick meat. And add some shredded ginger (both on the surface and inside the stomach)
In a small pan, add around 2 tablespoons of cooking oil and then fry garlic, spring onion for a while. Add chili sauce and fermented black beans. Fry until aromatic. Then add 2 tablespoons of cooking wine and 1 tablespoon of oyster sauce. Mix well.
Spread the sauce over the fish. And then steam over middle fire for 8 to 10 minutes.
Spread some chopped green onion. Heat around 2 tablespoons of hot oil and pour over the fish. This can improve the flavor. Do not be scared by the image, I do not use all of the oil for the fish.