工程咨询服务板块12月31日涨1.45%，华建集团领涨，主力资金净流入3.62亿元

Group 1 - The engineering consulting services sector increased by 1.45% on December 31, with Huajian Group 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] - Huajian Group's stock price rose by 9.98% to 21.70, with a trading volume of 769,800 shares and a transaction value of 1.64 billion [1] Group 2 - The engineering consulting services sector experienced a net inflow of 362 million in main funds, while retail investors saw a net outflow of 138 million [2] - The top stocks by main fund inflow included Huajian Group with 46.11 million, and Shencheng Jiao with 26.68 million [3] - The stock with the highest retail outflow was Shencheng Jiao, with a net outflow of 30.60 million [3]