地面兵装板块9月8日跌2.5%，长城军工领跌，主力资金净流出6.27亿元

Market Overview - The ground weaponry sector experienced a decline of 2.5% on September 8, with Changcheng Military Industry leading the drop [1] - The Shanghai Composite Index closed at 3826.84, up 0.38%, while the Shenzhen Component Index closed at 12666.84, up 0.61% [1] Stock Performance - Notable gainers in the ground weaponry sector included: - ST Emergency: closed at 8.60, up 4.12% with a trading volume of 361,700 shares and a turnover of 307 million yuan [1] - Optoelectronic Co.: closed at 18.26, up 2.82% with a trading volume of 157,200 shares and a turnover of 284 million yuan [1] - GanHua Science & Technology: closed at 11.01, up 2.32% with a trading volume of 117,600 shares and a turnover of 128 million yuan [1] - Changcheng Military Industry saw a significant drop, closing at 48.24, down 9.92% with a trading volume of 1,008,900 shares and a turnover of 499.9 million yuan [2] Capital Flow - The ground weaponry sector experienced a net outflow of 627 million yuan from institutional investors and 251 million yuan from retail investors, while retail investors saw a net inflow of 878 million yuan [2] - Specific stock capital flows included: - Optoelectronic Co.: net inflow of 9.49 million yuan from institutional investors [3] - Changcheng Military Industry: net outflow of 158 million yuan from institutional investors [3] - North Long Dragon: net outflow of 34.87 million yuan from institutional investors [3]