氧化铝期货主力连续合约涨2.20%，报2606元(人民币)/吨

Core Viewpoint - On December 17, the main continuous contract for alumina futures increased by 2.20%, reaching a price of 2606 RMB per ton [1] Group 1 - The alumina futures market experienced a notable price increase, indicating potential bullish sentiment among investors [1]