市场全天震荡走强，沪指涨近1%重返4000点，金属铝、化工板块集体爆发

Market Overview - The market experienced a strong upward trend, with the Shanghai Composite Index rising nearly 1% to reclaim the 4000-point level, closing at 4007.76, up 0.97% [1][2] - The Shenzhen Component Index increased by 1.73%, closing at 13452.42, while the ChiNext Index rose by 1.84%, closing at 3224.62 [1][2] - The total trading volume in the Shanghai and Shenzhen markets reached 2.06 trillion, an increase of 182.9 billion compared to the previous trading day [1] Sector Performance - The chemical sector saw a collective surge, with stocks like Yuntianhua and Chengxing shares hitting the daily limit [1] - The gas turbine concept continued to rise, with companies such as Triangle Defense and Weichai Power also reaching the daily limit [1] - The electric grid equipment sector maintained its strong performance, with Moen Electric achieving a three-day limit increase [1] - The electrolytic aluminum concept was active, with China Aluminum and Nanshan Aluminum stocks hitting the daily limit [1] - AI hardware concept stocks experienced fluctuations, with companies like Huile Ecology and Dongshan Precision reaching the daily limit, while Cambrian Technology rose over 9% [1] Declining Sectors - The tourism sector faced a collective decline, particularly in the ice and snow industry, with Dalian Shengya hitting the daily limit down [1] - The Hainan sector weakened, with Haikou Group also reaching the daily limit down [1][3] Leading and Lagging Sectors - Phosphate chemicals, semiconductors, and CPO sectors showed the highest gains, while Hainan, film and television, tourism, and hotel sectors recorded the largest declines [3]