The amount of milk for an 80-day-old baby is around 800ml a day, divided into five to six feedings, each at about 150ml. Night feedings for 80-day-old infants should be at longer intervals than daytime feedings, and the intervals should be consciously stretched so that the infants will slowly develop the habit of not taking milk at night. If the baby has dry stools, you can add some warm water between feeds. For infants within 6 months of age, if the amount of milk is sufficient, the average weight gain is 600 grams per month or at least 125 grams per week, if the weight does not increase or the growth is too slow, it means that the amount of milk is insufficient. In addition, do not add complementary foods too early, too early to add the infant will be due to immature digestive function, vomiting and diarrhea, digestive disorders. Due to individual variability, babies should be fed according to their needs and their weight gain should be monitored, and they should seek medical advice if they feel unwell.