基础建设板块12月22日涨0.05%，*ST正平领涨，主力资金净流出8912.66万元

Group 1 - The core viewpoint of the article highlights that the infrastructure sector experienced a slight increase of 0.05% on December 22, with *ST Zhengping leading the gains [1] - The Shanghai Composite Index closed at 3917.36, up by 0.69%, while the Shenzhen Component Index closed at 13332.73, up by 1.47% [1] Group 2 - In terms of capital flow, the infrastructure sector saw a net outflow of 89.1266 million yuan from main funds, while retail investors contributed a net inflow of 56.077 million yuan [2] - The sector also experienced a net inflow of 33.0496 million yuan from speculative funds [2]