房屋建设板块2月4日涨2.57%，龙元建设领涨，主力资金净流入2.26亿元

Group 1 - The housing construction sector increased by 2.57% on February 4, with Longyuan Construction leading the gains [1] - The Shanghai Composite Index closed at 4102.2, up 0.85%, while the Shenzhen Component Index closed at 14156.27, up 0.21% [1] - Major stocks in the housing construction sector showed varied performance, with China State Construction and Longyuan Construction seeing significant increases in their closing prices [1] Group 2 - The net inflow of main funds in the housing construction sector was 226 million yuan, while retail funds saw a net inflow of 31.6 million yuan [1] - The table of fund flows indicates that China State Construction had a net inflow of 400 million yuan from main funds, while retail funds experienced a net outflow [2] - Longyuan Construction had a net inflow of approximately 11.18 million yuan from main funds, with retail funds showing a net outflow [2]