Zheng Xing Xing Ye Ri Bao·2025-07-30 08:33Core Insights - The oil service engineering sector experienced a rise of 0.91% on July 30, with Qianeng Hengxin leading the gains [1] - The Shanghai Composite Index closed at 3615.72, up 0.17%, while the Shenzhen Component Index closed at 11203.03, down 0.77% [1] Stock Performance - Qianeng Hengxin (300191) closed at 21.00, up 11.82% with a trading volume of 350,000 shares and a transaction value of 712 million yuan [1] - Keli Co., Ltd. (920088) closed at 40.80, up 9.59% with a trading volume of 111,900 shares [1] - Tongyuan Petroleum (300164) closed at 5.79, up 7.22% with a trading volume of 2,382,700 shares and a transaction value of 1.367 billion yuan [1] - Other notable stocks include Zhunyou Co. (002207) up 6.22% and Beiken Energy (002828) up 2.53% [1] Capital Flow - The oil service engineering sector saw a net inflow of 104 million yuan from institutional investors, while retail investors experienced a net outflow of 155 million yuan [2] - The main capital inflow was led by Tongyuan Petroleum with a net inflow of 84.5 million yuan [3] - Qianeng Hengxin had a net inflow of 67.5 million yuan from institutional investors, but a net outflow of 60.4 million yuan from retail investors [3]