Market Performance - The professional engineering sector increased by 0.38% on January 27, with Shenghui Integration leading the gains [1] - The Shanghai Composite Index closed at 4139.9, up 0.18%, while the Shenzhen Component Index closed at 14329.91, up 0.09% [1] Top Gainers - Shenghui Integration (603163) closed at 101.59, up 10.01% with a trading volume of 49,100 shares and a turnover of 478 million yuan [1] - Yaxiang Integration (603929) closed at 149.60, up 10.00% with a trading volume of 57,600 shares and a turnover of 833 million yuan [1] - Huadian Technology (601226) closed at 11.40, up 7.34% with a trading volume of 1,433,400 shares and a turnover of 1.548 billion yuan [1] Top Losers - Feiqishi (605598) closed at 64.55, down 3.74% with a trading volume of 120,900 shares and a turnover of 772 million yuan [2] - China Zhongzhi (601618) closed at 3.15, down 3.08% with a trading volume of 3,112,400 shares and a turnover of 987 million yuan [2] - Sanwei Chemical (002469) closed at 9.29, down 2.62% with a trading volume of 208,500 shares and a turnover of 194 million yuan [2] Capital Flow - The professional engineering sector experienced a net outflow of 147 million yuan from institutional investors, while retail investors saw a net inflow of 124 million yuan [2] - The sector's overall capital flow indicates a mixed sentiment among different investor types [2] Individual Stock Capital Flow - Yaxiang Integration had a net inflow of 14.5 million yuan from institutional investors, but a net outflow of 23.57 million yuan from retail investors [3] - Huadian Technology saw a net inflow of 91.88 million yuan from institutional investors, with a net outflow of 84.49 million yuan from retail investors [3] - Shenghui Integration had a net inflow of 86.49 million yuan from institutional investors, but a net outflow of 51.20 million yuan from retail investors [3]