Challentec is one of the subsidiary companies of ZX Group. ZX Group was established in 1995. Our main business in the starting phase was focusing on elevator component manufacture. Starting as a SINO-US joint venture Group in elevator industry, ZX Group has taken the leading position by setting foot into American upper level markets. Later on, during our expansion period, with venture capitals joined in, ZX Group started to involve in the emerging renewable energy industry: wind turbine, turbine controller and inverter design. We have two subsidiaries - WIPO and Challentec (Wuxi) Co., Ltd.