A股早评：沪指重回3900点，创业板指高开超1%，山西废除“禁放令”，民爆概念股盘初活跃，海南、贵金属、CPO概念股高开，部分零售股调整

Market Overview - The A-share market opened with all three major indices rising, with the Shanghai Composite Index up by 0.26% at 3900.54 points, the Shenzhen Component Index increasing by 0.65%, and the ChiNext Index gaining 1.01% [1] Sector Performance - The abolition of the "fireworks ban" in Shanxi led to increased activity in the civil explosives sector at the market's opening [1] - Stocks related to Hainan, precious metals, and CPO concepts also opened higher, while some retail stocks experienced adjustments [1]