Why does the big iron pot used by hotel chefs never stick to the pot?

The reason why it doesn't stick is mainly because there is a lot of oil in cooking, so the food we usually eat in restaurants is better than home cooking, that's all.

Another reason is that when restaurants cook most dishes, whether they are meat dishes or vegetarian dishes, they will be oiled.

This can not only increase the rapid maturity of food, but also improve the taste of food itself, and another point is to prevent sticking to the pot.