The standard weight of a one-year-old baby is 9.9kg and the standard height is 76.9cm. at this time, most babies have been weaned from breast milk and can eat 3 meals, 2 snacks, 1 fruit, 1-2 times of formula every day, and the total amount of milk should not exceed 300ml. most babies can already walk alone, can bend down to pick up things, can put circles on sticks, and can hold things with their thumb and index finger pairs. Begin to use words, a word can mean many things, can call out the names of objects, such as lamp, bowl, point out their hands, eyes and other five senses. They are able to imitate adult actions, wave goodbye, hold a bottle and feed themselves, have likes and dislikes for people and things, dress cooperatively, and drink from a cup by themselves.