1. YONGKANG XINYUN IMP&EXP CO., LTD, we have our own factory and technical team. We have specilizing in all kinds of ebike over 7 years. 2. Our electric bike have CE/EN15194/SGS certification. 3. We do excellent after-sale service. Our sales Director and engineer normally visit Europe at least once per year for technical support and business development. 4. We use top quality engine, and test each engine before assemble. The key parts are of famous brand from Taiwan. Such as "topgun" front ...