Half a month after birth, add concentrated cod liver oil, 1 drop per day. One month after birth, in addition to 1 drop of cod liver oil per day, vegetable water or juice should be added, including tomato juice, hawthorn water and orange water. The initial feeding should be washed down and done between breastfeeding sessions. At 2 months, two drops (not pellets) of cod liver oil per day, and watermelon water can be added in summer in addition to the vegetable water or juice mentioned above. At 3 months of age, 3 drops of cod liver oil per day, with an appropriate increase in vegetable water or juice. At 4 months, 4 drops of cod liver oil per day (from 4 months to 12 months, 4 drops of cod liver oil per day), in addition to vegetable water and juice, 1/4 egg yolk should be added, and boiled water should be mixed into liquid food. At 5 months of age, in addition to vegetable water and fruit juice, egg yolk should be increased to 1/2 egg yolk and mixed into puree with boiling water; in addition, vegetable puree should be increased and several drops of boiled vegetable oil should be added to the vegetable puree and fed after mixing. At 6 months, in addition to vegetable water and juice, egg yolk is increased to 1, and rotten porridge, chopped vegetables and fruit puree (apple puree or banana puree, etc.) can be added, and a small amount of vegetable oil can be added to the chopped vegetables. At 7 to 9 months, you can eat a whole egg, add minced meat, liver or fish, add porridge or noodles, tofu, chopped vegetables, cookies, bread or dried buns, and a small amount of vegetable oil mixed into the minced meat, fish or chopped vegetables for cooking. From 10 to 12 months old, in addition to minced meat, liver puree, fish puree and eggs, you can add crushed shrimp, rotten rice, noodles, dumplings, wontons, bread, chopped vegetables (carrot puree, chopped celery, etc.), tofu, fruits, cookies, dried buns, cakes, snacks, etc.