地面兵装板块9月12日涨2.75%，北方长龙领涨，主力资金净流入1.48亿元

Market Overview - The ground equipment sector increased by 2.75% compared to the previous trading day, with North China Long Dragon leading the gains [1] - The Shanghai Composite Index closed at 3883.69, up 0.22%, while the Shenzhen Component Index closed at 12996.38, up 0.13% [1] Individual Stock Performance - North China Long Dragon (301357) closed at 136.33, up 12.91% with a trading volume of 86,200 shares and a transaction value of 1.105 billion [1] - Great Wall Military Industry (601606) closed at 50.50, up 7.17% with a trading volume of 669,900 shares and a transaction value of 3.251 billion [1] - Jieqiang Equipment (300875) closed at 46.83, up 5.78% with a trading volume of 85,300 shares and a transaction value of 392 million [1] - Inner Mongolia First Machinery (600967) closed at 19.97, up 4.06% with a trading volume of 647,500 shares and a transaction value of 1.270 billion [1] - China Ordnance Arrow (000519) closed at 18.69, up 3.32% with a trading volume of 437,700 shares and a transaction value of 812 million [1] Capital Flow Analysis - The ground equipment sector saw a net inflow of 148 million from institutional investors, while retail investors experienced a net outflow of 215 million [2] - The main capital inflow and outflow for specific stocks include: - Inner Mongolia First Machinery: net inflow of 10.31 million from main capital, net outflow of 101 million from retail [3] - China Ordnance Arrow: net inflow of 66.25 million from main capital, net outflow of 39.51 million from retail [3] - Jieqiang Equipment: net inflow of 46.19 million from main capital, net outflow of 72.92 million from retail [3]