The principle of baking pan is different from that of pan, because the principle of baking pan is to automatically control the central temperature of wok by touching the thermostat, which can be automatically reset to keep the central temperature within the standard temperature range. Pots are used for cooking. The principle is that the shape of the bottom of the pot makes the distance between the flames at the bottom of the pot equal, which helps to heat evenly. So the principle of baking tray and pot is different.