Clinically, it is easy to determine whether the epiphysis is closed by the following ways: 1. Patients should go to an orthopedic department of a secondary or higher hospital and have an X-ray plain film of the large joints taken under the guidance of a doctor. If the epiphysis is closed, the common joints are the knee, elbow and wrist joints. 2. After getting the plain film, the epiphysis is located at the junction between the diaphysis and the epiphysis of the bone, and before the end of growth and development, there is cartilage in this area, so it is a black line on the plain film. After the end of growth, this area will ossify into bone and gradually become a bright line. In this way, it is easy to determine whether the epiphysis is closed. 3. In clinical practice, there are departments that specialize in determining and predicting height, but these departments usually use computer software to make a comprehensive judgment of the above data, and in the final judgment, it may be necessary to take plain films of several parts, such as the knee joint, iliac bone, lumbar spine, elbow joint, wrist joint, hand joint, and so on, In the final judgment, it may be necessary to take plain films of several areas, such as knee, iliac bone, lumbar spine, elbow, wrist, hand, etc., to make a comprehensive judgment.