Put oil once when cooking, and put as much as you want. But the hot pot and soup base have all kinds of oils, such as soup base, butter-scented pot base and so on. Then you rinse the meat and bring all their fat to the pot, and then you rinse the vegetables, you will unconsciously eat very greasy things. But you don't usually realize it. You will feel tired because of a plate of cooking oil. Few people will find the dishes coming out of the soup very tired, right? And not only did you eat the fat of your own meat, but others' share was also in the soup, so the soup was particularly oily.