The most-traded February copper contract on the Shanghai Futures Exchange dropped 1.1 percent to 56,120 yuan ($8,800) a tonne on Tuesday. Data from China failed to boost prices of the metal used in power and construction in the previous session. China's copper imports in November reached their highest level since March 2010, rising 17.9 percent on the month to 452,022 tonnes, preliminary data from China's General Administration of Customs showed on Saturday.