We provide standardized, customer-centric return and exchange services for all bicycle and water bottle sports products, offering a 30-calendar-day return and exchange window calculated from the official order delivery date. To qualify for return or exchange, all submitted items must remain completely unused, unridden, unassembled, unwashed, unmodified and undamaged, retaining original brand-new condition with no riding traces, component wear, surface stains, artificial damage or structural deformation. All original factory packaging, including anti-collision foam layers, protective films, waterproof cartons, bicycle accessory kits, sealing parts and instructional manuals, must be fully intact without loss, damage or disassembly traces. Custom personalized modified bicycles, privately customized water bottle products and final sale clearance items are strictly non-returnable and non-exchangeable due to customized attributes and special promotional sales regulations. As sports equipment and daily hygiene containers with strict safety and secondary sales standards, any products that have been assembled, ridden, used for drinking, stained, artificially damaged, privately modified or improperly cleaned are ineligible for return and exchange. Bicycles with tire wear, frame scratches, component looseness and riding traces, as well as water bottles with internal dirt, sealing damage, cup body deformation and usage marks will be rejected for return applications to uphold unified product safety standards, functional performance and fair shopping experiences for all customers. To initiate a return or exchange request, users must submit an application via the official website portal with a valid order number and detailed problem description. After professional team review and approval, customers will receive an official return authorization number and standardized return shipping guidelines. Customers bear full responsibility for all return shipping fees and transportation risks unless the product has manufacturing defects, confirmed transit damage, warehouse shipping errors or missing factory accessories attributable to our team. We strongly recommend using professional trackable logistics services and fully restoring original shockproof, anti-collision and waterproof packaging during return shipment to prevent secondary structural damage, contamination and performance failure that invalidate return eligibility. After receiving and inspecting returned products to confirm full compliance with official return standards, we will process refunds or store credit exchanges within three to five business days. All refunds are issued via the original payment channel, with final arrival time dependent on the corresponding financial institution’s processing efficiency. Direct exchanges for different sizes, colors or styles are not available; qualified returned items can only be converted to store credits for subsequent purchases. For unresolved return and exchange inquiries, users may refer to the official FAQ page for detailed professional guidance and after-sales support.