【HIGH PURITY LIMESTONE】Chinese traditional wok adopting advanced German "oxygen casting" casting process, repeated filtration, purification and smelting at a high temperature of 2000 degrees to remove harmful substances, reaching food grade pure iron.Made into pure iron that is beneficial to the human body.【PRE-SEASONED】 We have pre-seasoned the iron wok pan. You don't need to season it after you buy it. You can use it after cleaning it. The inner wall of the wok pan is made of vegetable oil film to achieve physical non-stickiness. If the wok starts to stick after a period of use, you can use vegetable oil to re-season.【PRECAUTIONS】The inner wall of the wok pan is made of vegetable oil film. It cannot be dried on an open flame. You cannot store water in the wok for a long time. The vegetable oil film will fall off after improper use. After it has fallen off, you can use vegetable oil to pre-season it without affecting the use.Can use iron spatula and wire ball，Can use oven.【GIFT BOX PACKAGING】 suitable for home use.Gift to parents and friends【AFTER-SALES GUARANTEE】If the wok you received is damaged ,has irreparable defects during use, please contact us and we can replace you with a new one.