专业工程板块1月13日跌0.68%，上海港湾领跌，主力资金净流出9124.78万元

Market Overview - The professional engineering sector experienced a decline of 0.68% on January 13, with Shanghai Port 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] Stock Performance - Notable gainers in the professional engineering sector included: - Hangxiao Steel Structure (600477) with a closing price of 4.36, up 10.10% and a trading volume of 3.74 million shares, totaling 1.63 billion yuan [1] - Southeast Network Framework (002135) closed at 5.63, up 9.96% with a trading volume of 691,800 shares, totaling 375 million yuan [1] - Zhonghua Rock and Soil (002542) closed at 3.86, up 4.89% with a trading volume of 1.62 million shares, totaling 611 million yuan [1] Capital Flow - The professional engineering sector saw a net outflow of 91.25 million yuan from institutional investors, while retail investors had a net inflow of 172 million yuan [2] - The capital flow for specific stocks showed: - Southeast Network Framework (002135) had a net inflow of 67.09 million yuan from institutional investors, but a net outflow of 39.71 million yuan from retail investors [3] - Zhonghua Rock and Soil (002542) recorded a net inflow of 50.80 million yuan from institutional investors, with a net outflow of 27.88 million yuan from retail investors [3]