Generally, when a child reaches 8-12 months of age, he or she can be completely weaned from breast milk. The reason is that as the child grows up, breastfeeding can no longer meet the nutritional needs of the infant’s growth and development, and at this time the infant’s digestive function is gradually improving, and at 4-10 months the baby’s milk teeth are beginning to erupt and the chewing function is strengthening, so the baby can gradually adapt to a non-liquid diet. Most of the babies will gradually add complementary foods from 4-6 months after birth, and will be completely weaned at 8-12 months of age. The period from the addition of complementary foods to complete weaning is called the transition period, during which the number of nursing sessions should be minimized and more complementary foods added. If the infant is sick or encounters hot summer or severe winter, weaning can be delayed until the infant heals, spring warms up and autumn cools down.