The most-active September copper contract on the Shanghai Futures Exchange fell 0.5 percent to close at 71,130 yuan per tonne on Tuesday. "Worries over the euro debt crisis are mainly causing the bearish tone in LME copper today and are boosting the dollar's strength.
It is also being bogged down by a lack of upward momentum in ShFE copper, which is dragging along after crossing 70,000 yuan," said Minmetals Futures analyst Zhuo Gui Qiu.