Four-month-old babies are not allowed to eat Wan Chai steamed buns, because at this time the milk teeth have not sprouted, can not chew, and is a small round ball, easy to choke into the airway caused by suffocation. Breast milk is the most ideal natural food for infants within 6 months of age, breast milk contains a full range of nutrients, the ratio between various nutrients is reasonable, ideal for the body’s rapid growth and development, physiological functions are not fully developed infants, if for some reason can not breastfeeding, more than recommended 0-6 months of infants to drink formula, should not be directly with ordinary liquid milk, adult milk powder, protein powder, etc. Feeding infants. The addition of complementary foods to infants starts at 6 months of age, when first adding some juices, vegetable juices, and liquid foods. Then add pureed foods such as rice flour and vegetable puree. As well as soft rice, rotten noodles and other solid foods, is a gradual process from less to more, from thin to thick.