SMM, April 13: the current contract of electrolytic copper in North China today rose by 90 yuan / ton to 150 yuan / ton, and the transaction price was 41840 yuan / ton to 42100 yuan / ton. Shanghai copper return rose to 42000 yuan / ton, smelter high price shipment, quoted in the rising water 150 ~ 200 yuan / ton, but the actual transaction is more difficult, traders quoted in Shengshui about 100 yuan / ton, the transaction is general. Near delivery, the monthly price difference fluctuates greatly, the rising water quotation will also follow the monthly price difference to do the certain adjustment.