Core Insights - The oil service engineering sector experienced a slight increase of 0.13% on December 2, with Haiyou Development leading the gains [1] - The Shanghai Composite Index closed at 3897.71, down 0.42%, while the Shenzhen Component Index closed at 13056.7, down 0.68% [1] Stock Performance - Haiyou Development (600968) closed at 3.86, up 1.58% with a trading volume of 596,000 shares and a transaction value of 228 million yuan [1] - Haiyou Engineering (600583) closed at 5.54, up 1.28% with a trading volume of 441,300 shares and a transaction value of 244 million yuan [1] - Other notable stocks include: - Dongsi Thought (601808) at 14.41, up 0.84% [1] - Zhongyou Engineering (600339) at 3.40, unchanged [1] - Beiken Energy (002828) at 12.18, down 0.49% [1] - Shihua Oil Service (600871) at 2.33, down 0.85% [1] - Tongyuan Petroleum (300164) at 6.05, down 1.31% [1] - Huibo Yin (002554) at 3.55, down 1.66% [1] - Zhongman Petroleum (603619) at 22.24, down 1.94% [1] - Bomai Ke (603727) at 15.35, down 2.17% [1] Capital Flow - The oil service engineering sector saw a net outflow of 210 million yuan from institutional investors, while retail investors contributed a net inflow of 248 million yuan [2][3] - Key stocks with significant capital flow include: - Tongyuan Petroleum (300164) with a net outflow of 40.06 million yuan from institutional investors [3] - Renji Co. (002629) with a net outflow of 33.28 million yuan from institutional investors [3] - Zhongman Petroleum (603619) with a net outflow of 26.94 million yuan from institutional investors [3] - Huibo Yin (002554) with a net outflow of 21.44 million yuan from institutional investors [3] - Haiyou Engineering (600583) with a net outflow of 20.98 million yuan from institutional investors [3]

Core Insights - The oil service engineering sector experienced a rise of 1.78% on December 1, with Keli Co., Ltd. leading the gains [1] - The Shanghai Composite Index closed at 3914.01, up 0.65%, while the Shenzhen Component Index closed at 13146.72, up 1.25% [1] Stock Performance - Keli Co., Ltd. (code: 920088) closed at 32.01, with a gain of 6.17% and a trading volume of 39,200 shares, amounting to a transaction value of 123 million yuan [1] - Tongyuan Petroleum (code: 300164) closed at 6.13, up 5.69%, with a trading volume of 1,137,300 shares and a transaction value of 687 million yuan [1] - Zhun Oil Co., Ltd. (code: 002207) closed at 8.68, increasing by 4.20%, with a trading volume of 320,300 shares and a transaction value of 277 million yuan [1] - Other notable performers include Shihua Oil Service (code: 600871) with a 3.07% increase and a closing price of 2.35, and Tian Sihua (code: 601808) with a 2.29% increase, closing at 14.29 [1] Fund Flow Analysis - The oil service engineering sector saw a net outflow of 113 million yuan from institutional investors, while retail investors contributed a net inflow of 168 million yuan [2] - Keli Co., Ltd. had a net inflow of 11.38 million yuan from institutional investors, representing 9.25% of its total trading volume [3] - Other companies like Haiyou Development (code: 600968) and Tongyuan Petroleum experienced mixed fund flows, with Haiyou Development seeing a net inflow of 10.62 million yuan from institutional investors [3]

Core Viewpoint - The invention of a method for dynamic deformation and sound insulation analysis of door seals has been granted a national invention patent, which enhances noise control in well repair operations [1] Group 1 - The patented method is designed for noise control analysis in well repair operations, specifically for the evaluation of dynamic deformation and sound insulation of door seals [1] - It enables rapid assessment of different cross-sections of sealing strips and calculates sound insulation, establishing a database for dynamic deformation and sound insulation of various cross-sections [1] - The method supports better optimization of door sound insulation, features a simple processing model, and allows for efficient calculations [1]

Core Viewpoint - The company Haiyou Development has introduced a new powdered chemical reagent designed for rapid water quality analysis, addressing key technical challenges in the field [2] Group 1: Product Features - The reagent is specifically designed for quick and accurate detection of water quality [2] - It utilizes a precise formulation and solid reaction component encapsulation technology [2] - The product allows for a simple procedure where users can add water samples to complete the color reaction [2] Group 2: Technical Advantages - The reagent overcomes significant technical bottlenecks such as poor stability of key reagents in complex water bodies and high color interference [2] - This innovation enhances the reliability of water quality testing [2] Group 3: Company Communication - The company has engaged with investors through an interactive platform to provide insights on this new product [2] - Further significant matters related to the company will be disclosed through designated information disclosure media [2]

Market Overview - The oil service engineering sector saw a slight increase of 0.07% on November 27, with Renji Co., Ltd. leading the gains [1] - The Shanghai Composite Index closed at 3875.26, up 0.29%, while the Shenzhen Component Index closed at 12875.19, down 0.25% [1] Stock Performance - Renji Co., Ltd. (002629) closed at 8.33, up 5.04% with a trading volume of 242,300 shares [1] - Other notable stocks included: - CNOOC Development (600968) at 3.73, up 0.54% [1] - Zhongman Petroleum (603609) at 23.27, up 0.52% [1] - China Oil Engineering (600339) at 3.35, up 0.30% [1] - The overall trading volume and turnover for the oil service engineering sector were significant, with various stocks showing mixed performance [1][2] Capital Flow - The oil service engineering sector experienced a net outflow of 3.09 million yuan from institutional investors, while retail investors saw a net inflow of 30.19 million yuan [2] - The detailed capital flow for specific stocks indicated varying trends, with some stocks experiencing significant outflows from institutional and speculative investors [3] Individual Stock Capital Flow - Major stocks and their capital flow included: - CNOOC Engineering (600583) with a net inflow of 21.34 million yuan from institutional investors [3] - Zhongman Petroleum (603619) with a net inflow of 18.28 million yuan [3] - However, stocks like Huibo Energy (002554) and PetroChina Oilfield Services (600871) faced notable net outflows [3]

Core Insights - The oil service engineering sector experienced a decline of 1.87% on November 18, with PetroChina Oilfield Services leading the drop [1] - The Shanghai Composite Index closed at 3939.81, down 0.81%, while the Shenzhen Component Index closed at 13080.49, down 0.92% [1] Stock Performance - Zhongman Petroleum (603619) closed at 24.93, up 3.40% with a trading volume of 204,600 shares and a transaction value of 508 million yuan [1] - Potential Energy (300191) closed at 20.71, up 0.05% with a trading volume of 85,200 shares and a transaction value of 176 million yuan [1] - Other notable declines include PetroChina Oilfield Services (600871) down 4.26% and Tongyuan Petroleum (300164) down 3.73% [2] Capital Flow - The oil service engineering sector saw a net outflow of 136 million yuan from institutional investors, while retail investors had a net inflow of 184 million yuan [2] - Major stocks like Zhongman Petroleum and Renji Co. experienced mixed capital flows, with Zhongman Petroleum seeing a net inflow of 33.83 million yuan from institutional investors [3]

Core Viewpoint - CNOOC Development's stock price has experienced a decline, with a current trading price of 3.89 CNY per share and a market capitalization of 39.542 billion CNY, reflecting a year-to-date drop of 5.93% [1] Financial Performance - For the period from January to September 2025, CNOOC Development reported a revenue of 33.947 billion CNY, representing a year-on-year growth of 0.81%, and a net profit attributable to shareholders of 2.853 billion CNY, which is a 6.11% increase compared to the previous year [2] Shareholder Information - As of September 30, 2025, the number of shareholders for CNOOC Development increased by 10.86% to 74,000, while the average circulating shares per person decreased by 9.79% to 137,449 shares [2] - CNOOC Development has distributed a total of 4.747 billion CNY in dividends since its A-share listing, with 3.354 billion CNY distributed over the past three years [3] Institutional Holdings - As of September 30, 2025, Hong Kong Central Clearing Limited is the second-largest circulating shareholder with 100 million shares, a decrease of 5.92672 million shares from the previous period [3] - The Southern CSI 500 ETF ranks as the fifth-largest circulating shareholder with 29.432 million shares, down by 685,100 shares compared to the last period [3]

Core Viewpoint - The oil service engineering sector experienced a slight decline of 0.21% on November 17, with Keli Co., Ltd. leading the losses. The Shanghai Composite Index closed at 3972.03, down 0.46%, while the Shenzhen Component Index closed at 13202.0, down 0.11% [1]. Group 1: Market Performance - The oil service engineering sector's performance was mixed, with individual stocks showing varied results. For instance, Huibo Yin increased by 2.88% to close at 3.93, while Keli Co., Ltd. fell by 2.41% to 34.07 [1][2]. - The trading volume for Huibo Yin was 724,400 shares, with a transaction value of 282 million yuan, while Keli Co., Ltd. had a trading volume of 21,000 shares and a transaction value of 71.71 million yuan [1][2]. Group 2: Capital Flow - The oil service engineering sector saw a net outflow of 65.79 million yuan from institutional investors, while retail investors contributed a net inflow of 4.12 million yuan [2]. - Among individual stocks, Tongyuan Petroleum had a net inflow of 17.68 million yuan from institutional investors, while Keli Co., Ltd. experienced a net outflow of 8.81 million yuan [3].

Market Overview - The oil service engineering sector increased by 0.22% on November 14, with Renji Co., Ltd. leading the gains [1] - The Shanghai Composite Index closed at 3990.49, down 0.97%, while the Shenzhen Component Index closed at 13216.03, down 1.93% [1] Stock Performance - Renji Co., Ltd. (002629) closed at 9.74, up 7.27% with a trading volume of 538,100 shares and a transaction value of 524 million yuan [1] - Zhongman Petroleum (603619) closed at 23.78, up 6.54% with a trading volume of 238,600 shares and a transaction value of 565 million yuan [1] - Other notable performers include: - Zhun Oil Co. (002207) up 3.76% to 9.10 [1] - Tongyuan Petroleum (300164) up 3.06% to 6.39 [1] - Beiken Energy (002828) up 2.98% to 12.43 [1] Fund Flow Analysis - The oil service engineering sector experienced a net outflow of 141 million yuan from institutional investors, while retail investors saw a net inflow of 182 million yuan [2] - The detailed fund flow for selected stocks includes: - Zhun Oil Co. (002207) with a net inflow of 39.78 million yuan from institutional investors [3] - Tongyuan Petroleum (300164) with a net inflow of 16.10 million yuan from institutional investors [3] - Renji Co., Ltd. (002629) with a net inflow of 13.17 million yuan from institutional investors [3] Individual Stock Fund Flow - Notable net outflows from institutional investors include: - Zhong Oil Engineering (600339) with a net outflow of 26.02 million yuan [3] - Huibo Yin (002554) with a net outflow of 11.94 million yuan [3] - Retail investors showed significant inflows in several stocks, including: - Zhong Oil Engineering (600339) with a net inflow of 28.63 million yuan [3] - Huibo Yin (002554) with a net inflow of 18.89 million yuan [3]

Market Overview - The Shanghai Composite Index rose by 0.73% on November 13, with 27 out of 28 sectors experiencing gains, led by the power equipment and non-ferrous metals sectors, which increased by 4.31% and 4.01% respectively [1] - The oil and petrochemical sector saw a slight decline of 0.12%, with a net outflow of 579 million yuan in capital [1] Oil and Petrochemical Sector Analysis - Within the oil and petrochemical sector, there are 47 stocks, with 28 rising and 18 falling on the day [1] - The top three stocks with the highest net capital inflow were: - Sinopec Oilfield Service (369.595 million yuan) - Tongkun Co. (337.274 million yuan) - CNOOC Development (153.185 million yuan) [1] - The stocks with the highest net capital outflow included: - CNOOC (1.93 billion yuan) - PetroChina (1.01 billion yuan) - Unification Holdings (629.724 million yuan) [1] Capital Flow Summary - The following table summarizes the capital flow and performance of key stocks in the oil and petrochemical sector: | Code | Name | Daily Change (%) | Turnover Rate (%) | Main Capital Flow (10,000 yuan) | |--------|----------------|------------------|-------------------|----------------------------------| | 600938 | CNOOC | -2.10 | 1.87 | -1932.034 | | 601857 | PetroChina | -0.20 | 0.10 | -1014.741 | | 600506 | Unification | -0.10 | 28.24 | -629.724 | | 600346 | Hengli Petro | -0.15 | 0.33 | -507.347 | | 600583 | CNOOC Engineering | -0.34 | 1.40 | -343.601 | | 300164 | Tongyuan Oil | -2.21 | 22.93 | -276.618 | | 600256 | Guanghui Energy | 0.18 | 1.22 | -232.265 | | 000554 | Taishan Oil | -0.56 | 6.72 | -229.610 | | 002493 | Rongsheng Petro | -0.18 | 0.35 | -221.928 | | 300055 | Wanbangda | 0.12 | 4.43 | -215.356 | | 300191 | Qianeng Hengxin | -1.52 | 4.86 | -211.016 | | 000059 | Huajin Co. | 2.04 | 2.01 | -209.412 | | 002554 | Huibo Co. | -0.26 | 7.61 | -184.245 | | 600759 | Intercontinental Oil | 1.50 | 7.76 | -132.599 | | 603619 | Zhongman Oil | -0.93 | 2.59 | -130.928 | | 600688 | Shanghai Petro | 0.35 | 0.63 | -120.380 | | 002221 | Donghua Energy | 0.24 | 0.67 | -83.914 | | 601808 | CNOOC Service | -1.20 | 0.49 | -83.727 | | 000096 | Guangju Energy | 0.08 | 1.29 | -72.291 | | 600339 | Sinopec Engineering | 0.00 | 1.07 | -72.291 | | 002828 | Beiken Energy | -0.90 | 17.99 | -68.515 | | 002408 | Qixiang Tenda | 1.19 | 0.84 | -60.924 | | 002986 | Yuxin Co. | 0.62 | 0.84 | -46.701 | | 603798 | Compton | -0.23 | 2.13 | -43.220 | | 000968 | Blue Flame Holdings | 0.13 | 1.85 | -38.858 | | 300839 | Bohui Co. | 0.86 | 0.92 | -28.037 | | 000698 | ST Shenhua | 0.77 | 1.19 | -23.339 | | 603353 | Heshun Oil | 4.21 | 3.98 | -17.913 | | 600800 | Bohai Chemical | 2.21 | 2.17 | -8.393 [1]