How do you check the temperature of the hot pan.

Now the pan is hot, Alkalis can not say that. But if we do not have to check the heat of the pan and then.
How do you check the temperature of the hot pan.
We do. We should have known that the temperature of the hot pan to. The easy way out. Wok, then add a little water. When gradually increasing the temperature of the pan. The water will evaporate out. But the heat. We have to noticed that the water is mercury ball stage (a drop of water to a rolling water drop on a lotus leaf. Not droplets), or the like, is that we heat the pan with the oil to cook them.