The chinese firm borrows dollars to buy copper , which is then stored in bonded warehouses .
中国公司借美元来买铜，然后将其存在保税仓库中。
The market is providing traders who hold metal in chinese bonded warehouses with a powerful incentive to export .
当前市场为在中国保税区持有铜的交易商提供了强大的出口动力。
Recent photos taken by investment-bank analysts show where those imports end up . The copper sits in bonded warehouses , piled to the rafters , blocking doorways and occupying parking lots .
