South China sea Dan and enterprise was founded in 2007, through the CE, EN15194, ISO9001 authentication. Have many international and domestic invention patent technology. Dan and the mission of the company in the south China sea is to provide you with safety, environmental protection, low carbon energy saving for bicycle torque sensor type of power transmission device, and each foot power, electric bike tour bus, senior Chinese female assistants presenting a multi-function electric, miniature since balanced three rounds of electric power bicycle and other products series. The 2010 Shanghai world expo, Dan and technology during in manufacturing steps for electric power bicycle type in the world expo news work of environmental protection, volunteers use bicycle. Power The company possesses abundant technical strength, all for the sake of users, and at let consumers fully enjoy to Dan and the true value of the products, and would like to embody the indisputable fact that the ?