软件开发板块12月31日涨0.75%，中科江南领涨，主力资金净流入1.16亿元

Group 1 - The software development sector increased by 0.75% on December 31, with Zhongke Jiangnan leading the gains [1] - The Shanghai Composite Index closed at 3968.84, up 0.09%, while the Shenzhen Component Index closed at 13525.02, down 0.58% [1] - Zhongke Jiangnan's stock price rose by 20.00% to 24.72, with a trading volume of 321,100 shares and a transaction value of 760 million yuan [1] Group 2 - The software development sector experienced a net inflow of 116 million yuan from institutional investors, while retail investors saw a net inflow of approximately 51 million yuan [2] - Major stocks in the software development sector showed varied performance, with some experiencing significant declines, such as Guandao Tui, which fell by 21.82% [2] - The trading data indicates that institutional investors were more active in certain stocks, such as Keda Xunfei, which had a net inflow of 250 million yuan from institutional investors [3]