SMM, May 14: the current contract of electrolytic copper in North China today rose by 50 yuan / ton to 100 yuan / ton, and the transaction price was 43150 yuan / ton to 43290 yuan / ton. Today, the trend of copper futures in Shanghai is V-shaped, exploring the low risk guard 43000 yuan / ton after rebounding blocked 43200 yuan / ton first-line narrow finishing, the monthly price difference shrank to 200 yuan / ton, traders quoted under the limited expansion, Tianjin spot quotation temporarily stabilized, to maintain yesterday's 50 ~ 100 yuan / ton interval quotation, there are bargain purchases downstream.