It has good performance in preventing rats, termites and resisting ultraviolet rays. The termite prevention test passed the group method level 1 test. The product has been granted a utility model patent and its technology has reached the international leading level. It includes 1500V DC power cables, mainly used in DC power supply systems with a system voltage not exceeding 1500V. It is divided into cross-linked polyethylene insulated and ethylene propylene rubber insulated types. The product has been granted a utility model patent and its technology has reached the international leading level. It is widely used in nearly ten well-known domestic metro lines such as the Knowledge City Branch Line, Line 14 and Line 21 of Guangzhou Metro.