马钢股份：长江钢铁主要通过宝武平台采购铁矿石

Group 1 - The core viewpoint of the article is that the strategic collaboration between Ma Steel and Baosteel will not affect the existing business relationship between Baosteel and Changjiang Steel [2] - Baosteel's recent investment in Ma Steel is primarily focused on strategic synergy with Ma Steel [2] - Changjiang Steel mainly procures iron ore through the Baowu platform, utilizing the SOTC platform for imported ore and sourcing domestic ore from Ma Steel Group's subsidiaries [2]