Where is AliExpress US located?

Could you please clarify the location of AliExpress US? I understand that AliExpress is an online retail service owned by Alibaba Group, but I'm unsure of the specific location of its US operations. Is there a physical headquarters or office in the United States, or does it operate solely as an online platform? Additionally, are there any warehouses or distribution centers located in the US to facilitate faster shipping for US customers? I'd appreciate any information you can provide to help me better understand the geographic presence of AliExpress in the United States.