SHANGHAI, Jul. 7 (SMM) –On Friday, SHFE 1709 tin opened at RMB 144,430/mt, and hit a low of RMB 143,800/mt. But, the most active contract shot up before the closing time, and finally ended up RMB 80/mt or 0.06% at RMB 144,340/mt. Trading volumes decreased 2,904 lots to 11,220 lots, and positions rose 44 lots to 21,052 lots. SHFE 1709 tin will test support at RMB 143,000/mt during today’s night session.