aliexpress san mateo refers to the location of one of the many warehouses or fulfillment centers used by AliExpress to ship products globally. AliExpress is a Chinese-based online retail service that ships products from suppliers in China to customers worldwide. While most of the suppliers are based in China, AliExpress also has logistics operations in various countries, including the United States. The warehouse in San Mateo, California, serves as one of the key locations for processing and fulfilling orders that are shipped to U.S. customers. Orders from this warehouse can be delivered much more quickly than those shipped directly from China, thanks to its proximity to customers. AliExpress also utilizes local shipping carriers like USPS or FedEx for U.S. deliveries, and customers can track their orders through the AliExpress platform.