The thin wire inside the wire of the tram charger has leaked out and can be fixed with a wooden stick. According to the personal library website. Put the broken cables together evenly, and then fix them together with an adhesive tape. Then, prepare some small sticks or pieces of paper, wrap them around the cable and fix them with adhesive tape. Winding these sticks or pieces of paper around the cable can increase the tensile strength of the cable and prevent the cable from further breaking. It should be noted that if the cable has been broken to the inner core, other methods should be considered to repair it.