The cost of a child’s bone age test in a regular tertiary care hospital is usually within 100 RMB, including the consultation fee, registration fee and radiographic examination. If the bone age is normal, there is no extra cost. If the bone age is abnormal, children may need to choose certain medications or other treatments for the symptoms, and the cost may increase. The normal bone age test is a routine test for children under the age of ten, using radiation to the child’s wrist to determine the actual age of the child’s skeletal development and whether the child’s skeletal development is normal. If a child’s skeletal development is delayed or too fast, it is important to provide timely and effective treatment for the cause.