The wheel hub is damaged. Treatment: 1. The edge of the hub is scratched and damaged. Only a special aluminum ring repair rod is needed to repair it. 2. The damaged edge of the wheel hub can be repaired by a special aluminum welding machine for the wheel hub, and then the wheel hub can be refurbished and reshaped after welding. 3. The gap at the edge of the wheel hub needs to be repaired with a special aluminum ring repair rod, and then filled with a special wheel hub filling ash.