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Contact us for DYU bikes retailed on this site only For pre-sales, after-sales, order tracking and technical support Address: Fl.1503 Jia’anda Building, HuaFan Rd, DaLang street, Longhua New District, Shenzhen, China Email: [email protected] (Recommended) Tel: +8618768877815   For wholesale customers, please navigate to this page: Contact Us