Let's start with cooking. As you may know, vitamin C has poor thermal stability and can't be cooked for a long time because it is decomposed by heat. What's more, if the water is boiled, the food will not taste good. Let me talk about my cooking method first. First of all, clean the pot, don't leave water, and evaporate it with a torch. This has two effects. One is that the oil will not overflow when it is drained, and the other is that it can be effectively disinfected. Few bacteria can survive in such a high-temperature iron pot. Then drain the oil and heat it until it smokes. It won't be long. If it takes too long, the oil will decompose and produce carcinogens. Then put the vegetables in a hot pot and stir fry quickly. When the vegetables change from raw to cooked, they can be cooked. It doesn't matter if the food is cooked quickly. The fried food is crisp and nutritious. But meat should not be like this. Must be cooked. This meat is full of bacteria and must be cooked thoroughly. I'll give you these first I don't have much time. I'll give you some advice later Fast food mainly gives people a sense of hygiene. When customers see an unsanitary kitchen, they won't have the desire to come again next time. Moreover, most people who eat fast food eat dinner, and they also have a share, so they must have enough weight.