A股走弱，创业板指跌幅扩大至2%，沪指跌0.56%，深成指跌1.13%！CPO、液冷、电源、铜链接领跌，近4500股下跌

Core Points - The A-share market showed weakness, with the ChiNext index declining by 2% and the Shanghai Composite Index down by 0.56% [1] - A total of nearly 4,500 stocks in the Shanghai, Shenzhen, and Beijing markets experienced declines [1] Index Performance - Shanghai Composite Index: 3706.39, down by 20.90 points, or -0.56% [2] - ChiNext Index: 2549.83, down by 51.91 points, or -2.00% [2] - Shenzhen Component Index: 11687.68, down by 133.94 points, or -1.13% [2] - Sci-Tech Innovation 50 Index: 1106.97, down by 5.30 points, or -0.48% [2] - North Star 50 Index: 1592.03, down by 4.64 points, or -0.29% [2] - CSI 300 Index: 4192.85, down by 30.53 points, or -0.72% [2] - Shanghai 50 Index: 2800.69, down by 11.74 points, or -0.42% [2] Sector Performance - The sectors related to computing hardware, including CPO, liquid cooling, power supply, and copper connections, experienced significant declines [1]