[Purchase restriction instructions] In order to better ensure consumers' purchasing needs and avoid hoarding of goods, the same user can only purchase one item; the same user means that any information such as Dewu account number, mobile phone number, delivery address, etc. are consistent or point to the same user, they are regarded as the same user. [Return Instructions] Merchants are not responsible for unconditional returns due to non-quality issues such as product specificity, machine activation, removal of plastic packaging, etc. 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.