Zheng Xing Xing Ye Ri Bao·2025-07-30 08:27Core Viewpoint - The professional engineering sector experienced a decline of 0.34% on July 30, with significant losses led by Shikong Technology, while the overall market showed mixed results with the Shanghai Composite Index up by 0.17% and the Shenzhen Component Index down by 0.77% [1] Group 1: Market Performance - The Shanghai Composite Index closed at 3615.72, increasing by 0.17% [1] - The Shenzhen Component Index closed at 11203.03, decreasing by 0.77% [1] - The professional engineering sector saw a net outflow of 291 million yuan from main funds, while retail investors contributed a net inflow of 234 million yuan [2][3] Group 2: Individual Stock Performance - Tianwo Technology (002564) led the gains with a closing price of 8.28, up by 9.96% and a trading volume of 774,500 shares, amounting to a transaction value of 608 million yuan [1] - Shikong Technology (605178) experienced the largest decline, closing at 24.88, down by 9.99% with a trading volume of 11,400 shares and a transaction value of 28.43 million yuan [2] - Other notable performers included Zhite New Materials (300986) with a 4.82% increase and a closing price of 14.13, and Roman Co., Ltd. (605289) with a 4.07% increase and a closing price of 37.58 [1][2] Group 3: Fund Flow Analysis - Main funds showed a net inflow of 67.32 million yuan into Tianwo Technology, while retail investors had a net outflow of 32.17 million yuan [3] - Zhenhai Co. (603637) had a net inflow of 6.79 million yuan from main funds, but a net outflow of 4.85 million yuan from retail investors [3] - The overall trend indicates a mixed sentiment among different investor types within the professional engineering sector [2][3]