[SMM Flash: Repeatedly Approaching Limit Up! Guinea Mine Disruptions Spur Alumina Futures Surge, Watch These Risk Points] On the night of May 16, due to the revocation of mining rights for some bauxite companies in Guinea and the issuance of shutdown notices to some operating companies, involving significant capacity, concerns over bauxite raw material supply were triggered, leading to a massive influx of funds. Alumina futures surged nearly 7% during the session, approaching the limit up, with the highest intraday price reaching 3,149 yuan/mt, marking a new high since March 17. After the market opened on May 19, prices continued to rise sharply, with intraday gains exceeding 6% and approaching the limit up, leading the gains among various metals.