可以退货,现在网购商品都有七天无理由退货条款,如果对产品或者服务不满意,都可以申请退货的,不过缺保修卡并不属于产品质量问题,你恐怕得承担回寄的运费了、
You can return it. Online shopping products now have a seven-day free return policy. If you are not satisfied with the product or service, you can apply for a return. However, the lack of a warranty card does not constitute a product quality issue. You may have to bear the return shipping fee.