基础建设板块1月13日跌0.42%，东珠生态领跌，主力资金净流出7.52亿元

Market Overview - The infrastructure sector experienced a decline of 0.42% on January 13, with Dongzhu Ecological leading the drop [1] - The Shanghai Composite Index closed at 4138.76, down 0.64%, while the Shenzhen Component Index closed at 14169.4, down 1.37% [1] Top Performers - Guosheng Technology (603778) saw a closing price of 25.20, with a significant increase of 7.55% and a trading volume of 950,500 shares, amounting to a transaction value of 2.344 billion [1] - Chengbang Co., Ltd. (603316) closed at 15.86, up 4.07%, with a trading volume of 189,300 shares and a transaction value of 297 million [1] - Tunnel Co. (600820) closed at 6.68, up 2.30%, with a trading volume of 794,700 shares and a transaction value of 529 million [1] Underperformers - Dongzhu Ecological (603359) dropped by 10.02% to a closing price of 7.90, with a trading volume of 682,200 shares and a transaction value of 5.41 billion [2] - China Nuclear Engineering (601611) fell by 9.98% to 17.95, with a trading volume of 2,315,100 shares and a transaction value of 4.280 billion [2] - Palm Co. (002431) decreased by 7.29% to 2.67, with a trading volume of 1,255,000 shares and a transaction value of 341 million [2] Capital Flow - The infrastructure sector saw a net outflow of 752 million from institutional investors, while retail investors contributed a net inflow of 610 million [2] - The top net inflows from retail investors were observed in China Electric Power (601669) with 14.4 million, and Tunnel Co. (600820) with 50.6 million [3] - Conversely, significant net outflows were noted in China Energy Construction (601868) with 53.8 million and China Railway (601390) with 42.1 million [3]