SHANGHAI, Feb. 4 (SMM) –SHFE 1603 copper opened at RMB 36,040/mt on Thursday. The contract jumped to over one-month high at RMB 36,430/mt on short covering, and finally ended up RMB 780/mt at RMB 36,330/mt, with positions down 13,020. Market will eye US initial jobless claims, December durable goods orders, and December factory orders, which are expected to be mixed.