US experts invented fish preservation

U.S. experts invented a new method of fish preservation. They used to pack freshly caught fish into plastic bags and inject mixed gas into the bags. Among them, carbon dioxide accounted for 60%, oxygen accounted for 21%, nitrogen accounted for 19%, and sealed bags. Well, then put the fresh fish into the ordinary cold store. With this packaged fresh fish, the appearance and taste will not change after 4 weeks.

Source: China Fisheries News