Copper futures traded on Shanghai Futures Exchange up sharply "as stronger-than-expected U.S. March payroll data Friday hint at strong U.S. demand, which means more gains in LME 3-month copper ahead," says trader in Shanghai. Adds "SHFE lagged behind the LME rise last week and longs are now encouraged." Benchmark June contract at CNY69,330/ton, +CNY2,350 or 3.5%.