The indication of cast removal is not that the fracture has reached complete bony healing and the fracture line has completely disappeared, but the fracture line still exists, but it has been gradually blurred, and the fracture end has been able to withstand torsion and shear force. However, it does not mean that the fracture can bear the whole body weight, and the purpose of removing the cast is not to walk on the ground immediately, but to do the functional exercise of the joint without bearing weight. It is only after restoring the mobility of the joint that you can gradually walk on the ground, and you can’t bear weight completely and immediately, you need to go through a period of exercise and healing before you can gradually walk on the ground.