Zheng Xing Xing Ye Ri Bao·2025-12-30 09:08Core Insights - The oil service engineering sector experienced a 0.59% increase on December 30, with Junyou Co., Ltd. leading the gains [1] - The Shanghai Composite Index closed at 3965.12, showing no change, while the Shenzhen Component Index rose by 0.49% to 13604.07 [1] Sector Performance - Junyou Co., Ltd. (002207) closed at 7.69, up 3.22% with a trading volume of 240,600 shares and a transaction value of 182 million yuan [1] - Tongyuan Petroleum (300164) closed at 5.71, up 2.51% with a trading volume of 732,600 shares and a transaction value of 409 million yuan [1] - Zhongman Petroleum (603619) closed at 23.50, up 1.64% with a trading volume of 112,500 shares and a transaction value of 263 million yuan [1] - Other notable performances include Haiyou Development (600968) up 1.58% and Yingtai History (601808) up 0.72% [1] Capital Flow - The oil service engineering sector saw a net outflow of 43.23 million yuan from institutional investors, while retail investors contributed a net inflow of 63.65 million yuan [2] - The main capital inflow was observed in Junyou Co., Ltd. with a net inflow of 13.43 million yuan, while Haiyou Development and Tongyuan Petroleum also saw significant inflows [3] - Conversely, companies like Beiken Energy (002828) and Huibo Yin (002554) experienced notable net outflows from both institutional and retail investors [3]