There are many key stages in a child's growth, such as infancy, early childhood, school age, adolescence, and sleep.

1. Infancy: From birth to 25 years of age, it is the first peak period of growth and development. At this stage, the child grows very fast, usually about 0 cm in height. This is because after the baby is born, the organs of the body begin to gradually adapt to the external environment, and the secretion of growth hormone is relatively vigorous, which provides a driving force for the rapid growth of the body. Adequate breastfeeding or proper formula feeding can provide babies with the protein, calcium, phosphorus and other nutrients they need for growth, which can help with bone development.

2. Early childhood: 3 - 0 years old, the growth rate is slower than that of infancy, but still maintains a rapid growth. During this period, children begin to learn to walk and talk, and their activity increases, and their nutritional needs are also greater. A reasonable diet, including a balanced intake of cereals, vegetables, fruits, meat and other foods, can ensure sufficient energy and nutrients to support the body's growth. At the same time, proper outdoor activities can promote the synthesis of vitamin D, which helps in the absorption and utilization of calcium.

3. School-age: 12 - 0 years old, the body is in a phase of steady growth. During this period, children enter school and have a relatively fixed daily routine. Getting enough sleep is essential for growing taller because growth hormone secretion peaks during nighttime sleep. In addition, proper physical exercise, such as skipping rope, basketball, etc., can stimulate the bone growth plate and promote bone growth. Reasonable study pressure and a good psychological state are also conducive to children's growth and development.

4. Adolescence: Girls generally start from 28-0 years old, and boys from 0-0 years old, which is the second peak of growth and development. During puberty, sex hormones and growth hormone work together to cause rapid growth in height. Girls can grow about 0 cm in height during puberty, and boys can grow about 0 cm. At this time, in addition to ensuring adequate nutrition and sleep, attention should also be paid to psychological adjustment, because adolescent children may face some psychological changes, such as low self-esteem, etc., and poor psychological state may affect the secretion of growth hormone.

5. Sleep periods：夜間睡眠是生長激素分泌的高峰期，尤其是晚上 10 點到淩晨 2 點。生長激素的分泌呈脈衝式，且在深度睡眠時分泌量增加。因此，保證小孩在這個時間段進入深度睡眠狀態，有利於生長激素的分泌，從而促進身高增長。小孩應養成規律的作息習慣，每天保證足夠的睡眠時間。

The best time for a child to grow taller is in infancy, early childhood, school age, adolescence, and sleep. At these critical stages, parents should pay attention to their children's nutritional intake, sleep quality, physical exercise and psychological state, etc., to create a good growth environment for their children to promote the normal growth of their height. If the child has abnormal growth and development, he or she should be taken to the pediatric or endocrinology department of a regular hospital in time.

This article is only for health science popularization and does not constitute medication or medical guidelines, it is recommended to seek medical attention in time if you have health problems.