Zheng Xing Xing Ye Ri Bao·2025-10-17 08:37Core Insights - The oil service engineering sector experienced a decline of 0.96% on October 17, with RenZhi Co. leading the drop [1] - The Shanghai Composite Index closed at 3839.76, down 1.95%, while the Shenzhen Component Index closed at 12688.94, down 3.04% [1] Stock Performance - Top gainers in the oil service engineering sector included: - Tongyuan Petroleum (300164) with a closing price of 5.99, up 5.46% [1] - Zhunyou Co. (002207) at 8.42, up 4.34% [1] - Beiken Energy (002828) at 10.75, up 3.46% [1] - Notable decliners included: - RenZhi Co. (002629) at 7.95, down 1.85% [2] - Haijun Engineering (600583) at 5.39, down 1.46% [2] - Shipgen Aori (601808) at 13.63, down 1.45% [2] Capital Flow - The oil service engineering sector saw a net inflow of 123 million yuan from institutional investors, while retail investors experienced a net outflow of 182 million yuan [2][3] - Key stocks with significant capital flow included: - Tongyuan Petroleum with a net inflow of 1.16 billion yuan from institutional investors [3] - Zhunyou Co. with a net inflow of 37.83 million yuan [3] - Beiken Energy with a net inflow of 19.94 million yuan [3]