shein allows merchants to use third-party logistics companies for delivery.shein will require merchants to upload the tracking number within 24 hours of the customer's order and generate logistics information based on the tracking number within 72 hours, otherwise it will be considered as a violation of the law by the merchant and will be penalized by deducting the equivalent value of the commodity deposit. And the goods must be shipped within 7 working days, otherwise it will be regarded as a violation of the law by the merchant!