Is the coating of wok harmful?

This is no problem. Teflon is a fluorine-containing substance, and the temperature at which the fluorine coating begins to decompose needs to be above 450 degrees Celsius, which is unlikely to be achieved in a domestic pot. The temperature of oil smoke is generally around 150 degrees Celsius; If it reaches above 200 degrees Celsius, vegetables will be burnt. This coating can withstand temperatures above 260 degrees Celsius and will not decompose until 450 degrees Celsius, both of which are much higher than the daily frying temperature. Therefore, it will not be harmful to health in the process of normal cooking with non-stick pan. Of course, if the material used in the non-stick pan is not qualified Teflon, the safety is hard to say. However, no matter what kind of pot is used to stir-fry with strong fire or the cooking oil is burned too hot, toxic gases that cause cancer will be released in the lampblack. Therefore, avoid using too high a temperature to prevent smoke from escaping. It is most important to ensure adequate ventilation.