2. When the fish is cooked on a big fire, a catty of fish can be cooked in ten minutes, and if it is fresh fish, it takes less than ten minutes.
3. When the fish is cooked on low fire, it takes a long time, usually more than half an hour, before the fish can taste.
4. If you use stale fish, you should cook it for a long time, usually about 50 to 60 minutes, to prevent bacteria and other substances from harming the human body.