A股早评：三大指数集体低开，煤炭、光刻胶概念股盘初活跃

Market Opening - The A-share market opened lower, with all three major indices declining. The Shanghai Composite Index opened down 0.2% at 4077.72 points [1] - The Shenzhen Component Index opened down 0.42%, and the ChiNext Index opened down 0.63% [1] Sector Performance - Coal mining capacity expectations are tightening, leading to a significant increase in coking coal futures, which rose over 8%, driving up coal stocks [1] - The photolithography resin concept stocks opened high, with Guofeng New Materials and Pulite reaching the daily limit [1] - The rare earth permanent magnet and non-ferrous metal sectors experienced adjustments [1]