地面兵装板块1月12日涨2.75%，国科军工领涨，主力资金净流出3.35亿元

Market Overview - The ground equipment sector increased by 2.75% on January 12, with Guoke Military leading the gains [1] - The Shanghai Composite Index closed at 4165.29, up 1.09%, while the Shenzhen Component Index closed at 14366.91, up 1.75% [1] Stock Performance - Guoke Vehicle (688543) closed at 83.78, up 12.16% with a trading volume of 313,600 shares [1] - Galaxy Electronics (002519) closed at 11.47, up 9.97% with a trading volume of 434,800 shares [1] - North Navigation (600435) closed at 21.87, up 5.75% with a trading volume of 2,436,500 shares [1] - Inner Mongolia First Machinery (600967) closed at 19.54, up 2.57% with a trading volume of 1,252,200 shares [1] - Other notable stocks include Jieqiang Equipment (300875) up 2.09% and Tianzuo Equipment (300922) up 1.90% [1] Capital Flow - The ground equipment sector experienced a net outflow of 335 million yuan from institutional investors and 147 million yuan from retail investors, while retail investors saw a net inflow of 482 million yuan [2] - The capital flow for individual stocks shows varied trends, with Guoke Military experiencing a net inflow of 290 million yuan from institutional investors [3] - North Navigation had a net inflow of 113 million yuan from institutional investors, while Inner Mongolia First Machinery saw a net inflow of 24.82 million yuan [3]