The milk intake of infants can be calculated according to 135ml per kilogram of body weight per day, to be precise, for a 4-month-old baby who weighs 6kg, the amount of milk per day is 810ml. in general, the amount of milk for a 4-month-old baby is basically around 800ml per day, generally divided into 5-6 times per day, every 3-4 hours, with 150-200ml of milk each time, according to the child’s According to the child’s individual differences, breastfeed on demand. The baby’s stomach volume is small, so it is important to eat less and more. Nighttime feedings are longer than daytime intervals. Consciously lengthen the interval so that babies slowly develop the habit of not breastfeeding at night. Add warm boiled water during the baby’s 2 feedings to help the baby digest and absorb. Do not add complementary foods too early, add too early, the baby will vomit and diarrhea due to immature digestive function, so it is recommended to add complementary foods after 6 months of age.