Step 1: there are fish in the supermarket. It's a lot easier to do. If you do your own cleaning, you must pay attention to the fish and the skin.
Step 2: marinate the fish in Shaoxing wine for at least 15 minutes. Put salt on both sides of the container, put some sugar, ginger and onion into the steamer.
Step 3: seal the fish container with plastic wrap, fire and steam, and steam for about 10 minutes after boiling. Don't open the lid immediately after turning off the fire. Simmer for another 5 minutes.