Established in 2001,jiangxi Hongdu Voyage Industry Group Changzhou Hongdu E-bicycle CO.,Ltd.is an entERPrise under Jiangxi Hongdu Aviation manufacture and Changzhou Yucheng Ele.co.,Ltd.We are committed to manufacture high quality electric bicycles at reasonable prices.By the way we make the motor and controller by ourselves so that we can control the quality very well,any other information you need please do not hesitate to contact me.