Up to 100,000 tonnes of copper held in Shanghai bonded warehouses , confounding the world market as to its source and ultimate fate , probably belongs to China 's strategic state reserve , industry sources said on Friday .
<response> Up to 100,000 tonnes of copper held in <location>Shanghai</location> bonded warehouses , confounding the world market as to its source and ultimate fate , probably belongs to <location>China</location> 's strategic state reserve , industry sources said on Friday . </response>