Group 1 - The engineering consulting services sector increased by 0.47% compared to the previous trading day, with Matrix Co. leading the gains [1] - The Shanghai Composite Index closed at 3870.02, up by 0.87%, while the Shenzhen Component Index closed at 12777.31, up by 1.53% [1] - Key stocks in the engineering consulting services sector showed significant price increases, with Matrix Co. rising by 6.34% to a closing price of 23.30 [1] Group 2 - Major stocks that experienced gains include: - Bidwin Co. up by 4.60% to 17.07 - Youan Design up by 3.98% to 27.18 - Kansen Co. up by 3.86% to 8.35 [1] - The trading volume and turnover for Matrix Co. reached 96,400 shares and 222 million yuan, respectively [1] - The sector saw a net outflow of 186 million yuan from institutional funds, while retail investors contributed a net inflow of 59.22 million yuan [2]