Complementary foods are not recommended for babies over four months old at this time. Generally, four-month-old babies can grasp things with their hands, express happiness when they see their favorite food, and have certain feeding skills. Since the digestive function of four-month-old babies is not well developed, it is currently recommended that breastfed babies start to add complementary foods at six months, when breast milk and complementary foods can be fed together. The principle of adding complementary foods is to slowly cultivate your baby’s interest in other foods, from less to more, from one to many. At this time, you can choose to spoon feed your baby pureed fruits (e.g. apple puree), pureed vegetables, iron-containing formulated rice powder and rice paste. Start with a small amount, pay attention to your baby’s reaction to the food and interest in food. If there are no allergies, diarrhea, etc., you can slowly start to increase the amount and then gradually increase the frequency.