Ships and airplanes have been used for transport in this black-market trade. The shipments caught by customs authorities mostly originate from free industrial zones, also called export-processing zones, in China, Vietnam, Thailand, and Egypt.
轮船和飞机被这个黑市交易用来作运输工具。被海关当局查获的货物大国来自中国、越南、泰国和埃及的自由工业区，也称为加工出口区。