专业工程板块12月16日跌1.4%，上海港湾领跌，主力资金净流出2.39亿元

Market Overview - The professional engineering sector experienced a decline of 1.4% on December 16, with Shanghai Port leading the drop [1] - The Shanghai Composite Index closed at 3824.81, down 1.11%, while the Shenzhen Component Index closed at 12914.67, down 1.51% [1] Stock Performance - Notable gainers in the professional engineering sector included: - Xiangcheng Co., Ltd. (601133) with a closing price of 15.56, up 6.28% and a trading volume of 475,200 shares, totaling 726 million yuan [1] - Yaxiang Integration (603929) closed at 92.50, up 6.24% with a trading volume of 66,700 shares, totaling 600 million yuan [1] - Shenghui Integration (603163) closed at 62.68, up 5.01% with a trading volume of 51,900 shares, totaling 325 million yuan [1] - Conversely, significant decliners included: - Feifei History (605598) with a closing price of 47.91, down 7.12% and a trading volume of 122,200 shares, totaling 597 million yuan [2] - Nengjing Technology (301046) closed at 27.98, down 6.48% with a trading volume of 69,100 shares, totaling 197 million yuan [2] - Libet (605167) closed at 10.84, down 4.24% with a trading volume of 138,000 shares, totaling 151 million yuan [2] Capital Flow - The professional engineering sector saw a net outflow of 239 million yuan from institutional investors, while retail investors experienced a net inflow of 196 million yuan [2] - The capital flow for specific stocks indicated: - Xiangcheng Co., Ltd. (601133) had a net inflow of 101 million yuan from institutional investors, but a net outflow of 932 million yuan from retail investors [3] - Shenghui Integration (603163) recorded a net inflow of 38 million yuan from institutional investors, with a net outflow of 285 million yuan from retail investors [3] - Yaxiang Integration (603929) had a net inflow of 245 million yuan from institutional investors, but a net outflow of 813 million yuan from retail investors [3]