1. For customers who need express delivery, there is no need to change the shipping fee, as our express shipping fees are set according to weight and region. 2. For customers using freight shipping, please contact customer service after placing the order to adjust the price and remove the shipping fee originally included in the system. The customer will then be responsible for the logistics shipping costs themselves. 3. We are unable to track the shipment logistics, please understand.For non-quality issues, if the buyer returns the item without signing for it, we will claim reimbursement for the shipping costs.For non-quality issues, returns and exchanges are not accepted for bulk orders. Regarding the size being one size smaller, it is recommended to order one size larger. Regarding color differences, due to the contrast between light and dark during photography and differences between batches, the actual product may differ in color from the picture. This is not a quality issue, and return or exchange will require you to bear the return shipping cost. Regarding the smell, freshly manufactured shoes may have some glue odor, which is not related to quality issues. The glue odor will dissipate if the shoes are placed in a well-ventilated area. If you have any issues with the shoes sold after purchase, please contact our customer service immediately to explain the situation, and we will handle it. Regarding shipping, the default is YTO Express. For larger quantities, Yunda Express, ZTO Express, or small-scale logistics will be used. If you need other couriers or logistics services, please contact customer service. Regarding invoices, the prices of our products are all excluding tax. If you need an invoice, please contact customer service for assistance.