Cause analysis: It may be that the stewing time is too short.

Correct practice: 500g puffer fish. Heat the pan with salad oil and burn it to 120 ℃. Pour the cleaned puffer fish into the pan and cook it for 10 minutes on a high fire. Then cook it for 15 minutes on a low fire. Add in the Tianzheng secret sauce, onion, ginger, and fish skin and cook it for 2 minutes. Put the cooked fish into a container, and then pour the sauce on the fire until the sauce is thick. Features: fresh, tender and nutritious.