In the morning trading session, the three primary A-share indices experienced an upward trend, only to witness a collective nosedive in the afternoon. At the market's close, the Shanghai Composite Index saw a 0.31% decline, settling at 4,126 points. In contrast, the Shenzhen Component Index registered a 0.56% gain, while the ChiNext Index advanced by 0.82%. The overall market turnover soared to 3.99 trillion yuan, establishing a new record high and surging by 288 billion yuan compared to the preceding trading day. Notably, over 2,700 stocks witnessed an uptick, whereas nearly 2,600 stocks encountered a downturn. From a sector perspective, the AI application concept experienced a significant surge, the computing hardware concept staged a robust afternoon rally, the semiconductor sector posted gains, and the commercial aerospace concept exhibited localized activity. Conversely, the energy metals, insurance, and banking sectors spearheaded the declines, with the lithium mining concept experiencing a downturn and Guocheng Mining plummeting to its daily limit down.