TONGTU BICYCLE (GUANGZHOU) CO., LTD. GELEISEN 26” Electric Bicycle Shimano Tourney 7s AL6061 Frame Sport Ebike_TONGTU BICYCLE (GUANGZHOU) CO., LTD. is a full chain technology-based Electric Bicycle enterprise that integrates production, research and development, sales, and after-sales service. Its brand GELEISEN E-bike are popular worldwide.