Usually after six months children can add complementary foods, adding complementary foods principle is from one to many, from simple to complex. Usually it takes at least 1-2 weeks to add complementary foods, first add one kind of complementary food, such as starting with egg yolk, first add 1/8, then slowly 1/6, 1/4 to 1/3, 1/2, then to half egg yolk, then to one egg yolk. In this process, the time interval is about 1-2 weeks, at least for a week or so to ensure that there are no other intolerances. Intolerance means that there is no vomiting, change in appetite, change in stool pattern, no bouts of crying or bloating during the course of the supplement. If there is no intolerance, you can add another complementary food about 1-2 weeks after this time. Then gradually add it up again, and then change the amount of milk according to the age and slowly reduce it down. A varied diet allows for balanced nutrition and healthy growth of children. However, if intolerance occurs during the process of adding complementary foods, including vomiting, crying, change in stool pattern, lack of weight gain, and lack of height growth, you should go to the hospital promptly.