Mixed feeding of breast milk and formula may cause vomiting in infants. According to the description, the baby may experience discomfort due to mixed feeding, and it is recommended to take Xingpi Yanger granulesfor adjustment, and to provide easily digestible and absorbable foods, avoiding any adverse stimulation. Additionally, generally speaking, babies can start introducing small amounts of fresh fruit juice after 100 days, and if complementary foods are to be added, it should be done after the baby is four months old, such as egg yolks and fruit purees.