AARON Li, director of the Growth and Development Research Office of the Capital Institute of Pediatrics, said: "Generally speaking, if the bone age of a girl is over 15 years old and that of a boy is over 17 years old, then most of her epiphyses have been closed, and the chances of growing taller are very small. The sooner you know the situation of epiphyseal line closure, the earlier you intervene, the more you can intervene and treat your child. The best time to treat short stature with growth hormone is 2-13 years old. "