SHANGHAI, Jun. 27 (SMM) – SHFE 1310 zinc contract prices opened flat at RMB 14,370/mt. China's scale-efficiency industry enterprises realized RMB 470.55 billion in profits in May, up 15.5% YoY, inspiring the market. LME zinc prices strengthened and challenged USD 1,850/mt. SHFE zinc prices were pushed up by large numbers of longs, touching RMB 14,440/mt, and finally closing at RMB 14,420/mt, up RMB 50/mt or 0.35%. Trading volumes decreased by 23,292 lots, to 53,890 lots, and total positions increased by 1,258 lots to 159,386 lots.