When will the sand be ripe?

Stir-fry until the color darkens. When frying sand in an iron pan, be sure to heat the iron pan, then pour the sand in and fry it slowly with a small fire, so that the fried sand will gradually warm up and cannot be fried with a big fire. The sand fried by fire is too hot, and it will burn if you put the ingredients in it, so he won't teach you what ingredients to put in the sand fried by small fire, and the fried ingredients are delicious.