Mande Optoelectronics used to be the lighting division of Great Wall Motor. Later, because Great Wall Motor separated all auto parts, it became a wholly-owned subsidiary. Mande Electronic Appliance Co., Ltd. is mainly responsible for R&D and production of automobile lamps, as well as R&D, design, manufacture and sales of other automobile parts and accessories, refrigeration and air conditioning equipment and other related products. Therefore, Great Wall and Mande have close cooperation in business.