It is best to feed newborns at intervals of 3 hours, not too often. Newborns need to be fed at 3-hour intervals, generally 20-30ml at a time, because of the weak gastrointestinal function and the high protein content of formula milk which is not easy to digest, and water can be given to the baby between feedings to prevent the child from getting dry from fire and defecation. If you take mixed feeding method at this time, i.e. formula and breast milk feeding at the same time, you can reduce the amount of formula appropriately, but you should also take regular and quantitative feeding, generally the best interval is also about 3 hours. The specific situation should be adjusted according to the child’s individual situation, but not too much, otherwise it will lead to indigestion. In addition, after feeding, parents need to hold the child upright and gently pat the back to help the baby burp to avoid overflow. It is also important not to add complementary foods to the child too early, as this is not good for the child’s gastrointestinal development.