The developmental standards for 6-year-old children are based on height and weight. 6-year-old girls should be 116.6 cm tall and weigh 20.37 kg, while 6-year-old boys should be 117.7 cm tall and weigh 21.26 kg. If you want to find out whether your child’s development is normal, for example, if a child appears to be slightly shorter than normal, you will need to have the child’s bone age tested. Bone age test. Bone age is an indicator of a child’s actual biological age, i.e., an orthopedic radiograph of the left wrist. When the height corresponding to the bone age test is within one year of the child’s actual height, it is considered normal. If the child’s actual height is more than 1 year behind the height for bone age, the child is considered to be slightly short. In this case, it is necessary to actively intervene in life, to achieve a balanced and reasonable diet, do not favoritism, picky eating, and at the same time to ensure sufficient sleep every day. Appropriate bouncing physical activities every day are beneficial to the child’s growth and physical health. After half a year to one year of observation, the child can reach the normal standard of various indicators, you can continue. If the child still cannot reach the normal standard, it is necessary to further check the indicators of the child’s nutritional status in detail, and whether there is any disease that causes the child to continue the intervention.