Official Enterprise Information

Legal Operating Entity: Jilin Dongda Technology Co., Ltd. Registered Address: Unit 2, Room 304, Building 9, Deyi Mingdian, located south of Zili West Street and east of Benchi Road, Luyuan District, Changchun City Customer Service Email: service@sereinfly.com Customer Service Phone: 17367167884 Business Hours: Monday to Friday: 9:00 AM – 5:00 PM

Customer Service Instructions For any inquiries about product ingredients, order status, logistics and delivery, return and exchange applications, privacy policies, or product optimization suggestions, please reach out to our professional customer service team. Our customer support team is available Monday to Friday, 9:00 AM–5:00 PM. You may email us at any time at service@sereinfly.com, and we will respond as soon as possible during business hours.