The fire of casserole is different from that of other types of pots. General use of iron pot cooking fire is wu fire - wen fire - wu fire, while the casserole cooking is the first wen fire, and then wang fire, to be soup boiling, and then finally cooked with wen fire. After burning the dishes, the casserole should be placed on a dry wooden board or grass mat, never put on the tile or cement floor, otherwise the casserole sudden cold will rupture, easy to burn people. Before using the new casserole, it is best to use rice water to cook, so that you can block the casserole subtle holes to prevent seepage, in order to extend the service life. Before each use, must first dry the water outside the casserole. If you find less water when cooking, you should add some warm water in time. The soup in the pot should never overflow or burn dry. Casserole most avoid empty pot dry burning, and not to put the cold pot violently on the fire, so as to avoid casserole cracking.