SHANGHAI, Sept. 16 (SMM) – After most active SHFE aluminum contract trimmed gains from a higher opening on profit-taking by the longs, spot aluminum price in South China slightly dipped in response. Mainstream traded prices in the region were between RMB 17,730-17,760/mt. Goods holders’ selling interest turned low after spot price failed to return to the RMB 17,800/mt mark, and market transactions were rare despite purchases for stock building before the week ends.