SHANGHAI, Jul. 24 (SMM) – In Shanghai tin market, spot prices were dragged lower on Tuesday by increasing low-priced resources. Only Yunnan Tin Group held prices firm at RMB 138,000-138,500/mt. Traded prices for Nanshan and Kaiyuan were mainly at RMB 135,700-136,000/mt, while transactions for Yunheng and Yunshan were made at RMB 136,500-137,000/mt. Transactions remained quiet.