You'd better add sugar before cooking. Adding salt to food will dehydrate food and solidify tissues, so if you add salt first and then sugar, it will not dissolve easily. If vinegar is added first, sugar will not dissolve easily. Adding vinegar first will have a sour taste, but if you add soy sauce or monosodium glutamate first, you will lose its fragrance and flavor. Sugar can not only harmonize the taste, enhance the color beauty of dishes, but also provide rich calories for the human body. Sugar in vegetables can increase the flavor of vegetables; Adding sugar to bacon can promote the protein expansion of collagen and make the meat tissue soft and juicy. In other words, sugar can be added before cooking. Protein can be solidified by salt, so when cooking raw materials rich in protein (such as fish soup), you can't put salt first. It's best to wait until the soup is cooked and ready to be cooked before adding salt. But if you fry vegetables, you can put salt early, so the vegetables will be cooked quickly. In cook the meat or potatoes, adding a little vinegar is easy to stew and tastes good. MSG works best at 70℃-90℃, so it must be put after the dishes are ready. If you use a variety of spices, you should pay attention to the order of placement. The ideal order is: sugar first, then salt, vinegar, soy sauce, and finally monosodium glutamate. When cooking food, add sugar first, wait until it is about half cooked, and then add salt, soy sauce and so on in turn. This is because salt has a strong penetrating effect on food, so if sugar is added first, the taste of sugar will not easily enter the food, and salt has the property of fixing food tissue, so it is best to add sugar first when cooking. Adding salt to food will dehydrate food and solidify tissues, so if you add salt first and then sugar, it will not dissolve easily. If vinegar is added first, sugar will not dissolve easily. Adding vinegar first will have a sour taste, but if you add soy sauce or monosodium glutamate first, you will lose its fragrance and flavor. In addition, some dishes need wine, and it is best to put it after sugar, so as to remove the fishy smell and soften the food. Soy sauce and monosodium glutamate can be saved until the end, and their unique flavor can be preserved. So, don't forget the order of sugar, wine, salt, vinegar, soy sauce and monosodium glutamate when adding seasoning next time.