1, salt rubbing method, take half a teaspoon of salt, spread it evenly on the surface of the fish, then rub it hard, sprinkle a little flour or starch, continue rubbing for about 1-2 minutes, rinse it off and remove mucus.

2, hot water method, first scrape the surface of the fish with a knife, remove excess mucus, and then rinse. Boil a pot of boiling water, let it cool to about 80 degrees, slowly pour it on the surface of the fish with a spoon, continue to scrape it with a knife, and rinse it to remove mucus.