[Purchase restriction instructions] In order to better ensure consumers' purchasing needs and avoid hoarding of goods, the same user can only purchase 3 items; the same user refers to any information such as Dewu account number, mobile phone number, delivery address, etc. that is consistent or points to the same user, and is deemed to be the same user. [Return Instructions] Due to the particularity of the product, machine activation, removal of plastic packaging or original seals and other non-quality issues, the merchant is not responsible for unconditional returns. If the product has appearance problems and cannot provide an unboxing video, the merchant will not provide unconditional return service. Set items cannot be returned individually.