专业工程板块1月28日涨0.91%，铜冠矿建领涨，主力资金净流出4.19亿元

Market Performance - The professional engineering sector increased by 0.91% on January 28, with Tongguan Mining Construction leading the gains [1] - The Shanghai Composite Index closed at 4151.24, up 0.27%, while the Shenzhen Component Index closed at 14342.9, up 0.09% [1] Top Gainers in Professional Engineering Sector - Tongguan Mining Construction (code: 920019) closed at 28.00, up 15.27% with a trading volume of 226,100 shares and a transaction value of 618 million yuan [1] - China Aluminum International (code: 601068) closed at 6.64, up 9.93% with a trading volume of 665,600 shares and a transaction value of 426 million yuan [1] - Roman Co., Ltd. (code: 605289) closed at 74.80, up 7.67% with a trading volume of 101,500 shares and a transaction value of 760 million yuan [1] Top Losers in Professional Engineering Sector - Zhite New Materials (code: 300986) closed at 37.65, down 12.99% with a trading volume of 962,600 shares and a transaction value of 374 million yuan [2] - Zhenhai Co., Ltd. (code: 603637) closed at 11.98, down 9.99% with a trading volume of 239,300 shares and a transaction value of 289 million yuan [2] - Feiguishang (code: 605598) closed at 61.30, down 5.03% with a trading volume of 71,400 shares and a transaction value of 443 million yuan [2] Capital Flow Analysis - The professional engineering sector experienced a net outflow of 419 million yuan from institutional investors, while retail investors saw a net inflow of 476 million yuan [2] - The net outflow from retail investors amounted to 56.46 million yuan [2] Individual Stock Capital Flow - For Asia Xiang Integration (code: 603929), the net inflow from institutional investors was 15.7 million yuan, while retail investors had a net outflow of 19.41 million yuan [3] - China Aluminum International (code: 601068) saw a net inflow of 10 million yuan from institutional investors, with retail investors experiencing a net outflow of 74.75 million yuan [3] - Tongguan Mining Construction (code: 920019) had a net inflow of 58.91 million yuan from institutional investors and a small net inflow of 2.24 million yuan from retail investors [3]