A frying pan can be made of many materials. If it is an iron pan, it is divided according to the quality of the iron. The worst is the cast iron pan. The iron is impure, the surface is rough and uneven, and some cracks can be seen. The heat conduction effect is very uneven, the sound of tapping the pot body is not loud, the better one is the cast iron pot, the iron quality is relatively pure, the surface is relatively flat, the heat conduction effect is better, the sound of tapping the pot body is relatively loud, the best is the fine iron pot. , The iron is the purest, the surface is smooth and delicate, the heat conduction effect is ideal, and the sound of tapping the pot is loud.