基础建设板块12月23日跌0.2%，东珠生态领跌，主力资金净流出2.46亿元

Market Overview - The infrastructure sector experienced a decline of 0.2% on December 23, with Dongzhu Ecology leading the losses [1] - The Shanghai Composite Index closed at 3919.98, up 0.07%, while the Shenzhen Component Index closed at 13368.99, up 0.27% [1] Stock Performance - Notable gainers in the infrastructure sector included: - Pudong Construction (600284) with a closing price of 8.52, up 5.97% and a trading volume of 503,600 shares, totaling 423 million yuan [1] - Tusheng Technology (603778) closed at 13.87, up 5.64% with a trading volume of 921,300 shares, totaling 1.25 billion yuan [1] - ST Jianhai (002586) closed at 4.31, up 5.12% with a trading volume of 134,800 shares, totaling 57.81 million yuan [1] - Major decliners included: - Dongzhu Ecology (603359) closed at 8.06, down 5.40% with a trading volume of 208,000 shares, totaling 170 million yuan [2] - ST Zhengping (603843) closed at 4.46, down 4.90% with a trading volume of 563,000 shares, totaling 253 million yuan [2] - Jiaojian Co. (603815) closed at 7.58, down 4.89% with a trading volume of 429,300 shares, totaling 325 million yuan [2] Capital Flow - The infrastructure sector saw a net outflow of 246 million yuan from institutional investors, while retail investors contributed a net inflow of 201 million yuan [2] - The table of capital flow indicates that: - Pudong Construction had a net inflow of 42.01 million yuan from institutional investors, while retail investors had a net outflow of 31.68 million yuan [3] - China Nuclear Engineering (601611) experienced a net inflow of 22.74 million yuan from institutional investors [3] - Xinjiang Communications Construction (002941) had a net inflow of 19.49 million yuan from institutional investors [3]