地面兵装板块8月21日跌2.71%，内蒙一机领跌，主力资金净流出14.29亿元

Market Overview - The ground equipment sector experienced a decline of 2.71% on August 21, with Inner Mongolia First Machinery Group leading the drop [1] - The Shanghai Composite Index closed at 3771.1, up 0.13%, while the Shenzhen Component Index closed at 11919.76, down 0.06% [1] Stock Performance - Notable stock performances included: - Tianqiao Equipment (300922) rose by 1.77% to close at 28.16 with a trading volume of 71,700 shares and a turnover of 200 million yuan [1] - Inner Mongolia First Machinery Group (600967) fell by 4.37% to close at 25.15, with a trading volume of 1,111,900 shares and a turnover of 2.832 billion yuan [2] - North China Longyuan (301357) decreased by 3.63% to close at 162.57, with a trading volume of 63,100 shares and a turnover of 1.041 billion yuan [2] Capital Flow - The ground equipment sector saw a net outflow of 1.429 billion yuan from institutional investors, while retail investors had a net inflow of 1.448 billion yuan [2][3] - Specific stock capital flows indicated: - Tianqiao Equipment had a net inflow of 12.12 million yuan from institutional investors [3] - North China Longyuan experienced a significant net outflow of 110 million yuan from institutional investors [3] - Inner Mongolia First Machinery Group had a net outflow of 270 million yuan from institutional investors [3]