The most-active October copper contract on the Shanghai Futures Exchange fell less than 2 percent to close at 72,010 yuan per tonne on Tuesday, after rising 1.1 percent in the previous session. "China's weak PMI and data out of other parts of the world have caused concerns about a slowing global economy. The high price of copper is also deterring restocking by end users in China," Shanghai Dongzheng futures analyst Du Xiao Hua.