格隆汇2月5日｜四方股份今日跌停，成交额15.19亿元，换手率4.96%，盘后龙虎榜数据显示，沪股通专 用席位买入8135.86万元并卖出1.25亿元，2家机构专用席位净买入6606.63万元，有1家机构专用席位净 卖出3.55亿元。 ...

Market Overview - The indices experienced fluctuations in the afternoon, with declines narrowing. The Shanghai Composite Index reported at 4078.82 points, down 0.57%, while the Shenzhen Component Index was at 13969.10 points, down 1.32%, and the ChiNext Index at 3266.71 points, down 1.35% [1] Sector Performance - The banking sector saw significant gains, with Xiamen Bank hitting the daily limit and reaching a new high since June 2021 [1] - The innovative drug sector was notably active, with Guangsheng Tang rising over 10% [1] - The securities sector also experienced a surge, with Hualin Securities hitting the daily limit and other companies like Huaxin Securities, Huatai Securities, and Dongfang Caifu following suit [1] - The tourism and hotel sector showed strength, with Sanxia Tourism reaching the daily limit [1] - Conversely, the precious metals sector faced ongoing adjustments, with Hunan Gold and Hunan Silver hitting the daily limit down [1] - The afternoon saw weakness in the electric grid equipment stocks, with Sifang Co. hitting the daily limit down [1] Stock Movement - Overall, the market saw more stocks declining than rising, with over 3500 stocks down [1] - The beauty care, film and television, and banking sectors led in gains, while BC batteries, photovoltaic equipment, and precious metals sectors led in losses [1]

Core Viewpoint - Sifang Co., Ltd. experienced a significant stock decline, hitting the limit down price of 36.42 yuan, with a drop of 9.98%, resulting in a total market value of 30.353 billion yuan and a circulating market value of 30.058 billion yuan, with a total transaction amount of 1.219 billion yuan as of the report date [1]. Group 1: Reasons for Stock Decline - Internal challenges include talent retention issues, with multiple departures among incentive targets, raising concerns about the company's innovation capacity and business stability, which negatively impacts stock prices [2]. - The competitive environment is intensifying, particularly in the new power system and SST sectors, which may attract more competitors. Despite Sifang's technological advantages, increased competition could squeeze market share and profit margins, leading to investor concerns [2]. - The overall performance of the solar (photovoltaic) sector may have been poor on the day of the stock decline, or there may have been a market correction in the power-related sector, affecting Sifang's stock price. Additionally, following a historical high on February 3, profit-taking may have triggered a short-term stock adjustment [2]. - After reaching a new high on February 3, some funds may have opted to take profits, resulting in capital outflow. From a technical perspective, the stock may have shown signs of being overbought, necessitating a correction, with indicators like MACD potentially signaling unfavorable trends [2].

Group 1 - The A-share market saw a collective rebound on February 3, with the only electric grid equipment ETF (159326) rising by 3.38% and achieving a trading volume of 1.514 billion yuan, driven by news catalysts [1] - The global AI computing power construction is entering an explosive phase, with high-power and stable power supply becoming essential for computing clusters, leading to an upgrade of power transformers as core infrastructure [1] - In regions like Guangdong and Jiangsu, many transformer factories are operating at full capacity, with some orders for data center-related businesses scheduled as far out as 2027 [1] Group 2 - The electric grid equipment ETF (159326) tracks the CSI Electric Grid Equipment Theme Index, with a strong representation in sectors such as transmission and transformation equipment, grid automation equipment, and distribution equipment [2] - The smart grid sector holds a significant weight of 88% in the index, while ultra-high voltage equipment accounts for 65%, both being the highest in the market [2] - Leading companies in the export market include TBEA, China XD Electric, and others, indicating a strong presence in the international market [2]

格隆汇2月3日丨四方股份(601126.SH)涨7.66%，报40.620元，股价创历史新高，总市值338.44亿元。 ...

声明：市场有风险，投资需谨慎。 本文基于第三方数据库自动发布，不代表新浪财经观点，任何在本 文出现的信息均只作为参考，不构成个人投资建议。如有出入请以实际公告为准。如有疑问，请联系 biz@staff.sina.com.cn。 2月3日，四方股份涨5.12%，截至发稿，报39.66元/股，成交8.95亿元，换手率2.80%，总市值330.44亿 元。 责任编辑：小浪快报 易方达环保主题混合A（001856）成立日期2017年6月2日，最新规模32.69亿。今年以来收益7.57%，同 类排名1171/8874；近一年收益63.64%，同类排名809/8124；成立以来收益442.8%。 易方达环保主题混合A（001856）基金经理为祁禾。 截至发稿，祁禾累计任职时间8年41天，现任基金资产总规模151.31亿元，任职期间最佳基金回报 414.4%， 任职期间最差基金回报4.01%。 资料显示，北京四方继保自动化股份有限公司位于北京市海淀区上地信息产业基地四街9号，成立日期 1994年4月8日，上市日期2010年12月31日，公司主营业务涉及继电保护、电网自动化及发电厂自动化产 品的研发、生产、销售和技术服务。主 ...

Core Insights - The company has deep expertise in the power electronics field, having won 1 National Science and Technology Progress Award and over 20 provincial and ministerial first prizes, with multiple products included in national key project plans [1] - Key achievements include high-efficiency, high-density, large-capacity DC transformer components, critical technologies, and core equipment, as well as research and engineering applications for multi-terminal flexible DC distribution networks [1] Company Overview - The company has developed a comprehensive product matrix in power electronics and DC fields, including medium-voltage converters, power electronic transformers, DC control protection systems, coordinated controllers, shore power, and ice-melting systems, covering critical areas such as flexible DC transmission and distribution, grid-forming equipment, power quality management, and special power supplies [1] - The company has established a full industry chain layout from technology research and development to product manufacturing and engineering applications [1] Key Technology Focus - The company focuses on several key technology areas, including flexible DC transmission technology, where it has participated in multiple national key projects, accumulating rich core technologies [1] - The medium-voltage solid-state transformer (SST) series devices, energy management systems, and DC control protection systems have been applied in demonstration projects [1] - In grid-forming technology, the company leverages its deep understanding of grid interactions to propose solutions for various application scenarios, including grid-forming energy storage and grid-forming SVG [1] Recent Achievements - The company has made significant breakthroughs in power quality management, providing a 250 Mvar SVG power quality comprehensive management device for the first million-ton near-zero carbon steel production line at Baosteel's Zhanjiang Steel, marking a revolutionary shift from carbon metallurgy to hydrogen metallurgy in China's steel industry [1] - This project not only showcases the company's leading technological strength in power quality management but also supports steel enterprises in balancing environmental compliance with production efficiency [1] - The integration with hydrogen metallurgy processes creates a replicable and scalable system solution and engineering practice model for the green transformation of large-capacity electric arc furnaces [1]

Core Viewpoint - The data center sector is driving significant growth in the power equipment industry, with capital expenditures showing high growth trends, particularly in overseas markets, while domestic giants like Alibaba and Tencent are experiencing a slowdown in capital spending [1][3]. Demand Side - Overseas capital expenditures from major companies reached $99.617 billion in Q3 2025, reflecting an 80.39% year-on-year increase and a 9.54% quarter-on-quarter rise [3]. - Domestic capital expenditures for Alibaba amounted to 31.5 billion yuan in Q3 2025, a year-on-year increase of 80.10% but a quarter-on-quarter decrease of 18.55%. Alibaba reaffirmed its three-year investment framework of 380 billion yuan, indicating potential for further investment [3]. - Tencent's capital expenditures were 13 billion yuan in Q3 2025, showing a year-on-year decline of 24.05% and a quarter-on-quarter decline of 32.05%, with a downward revision of its annual guidance [3]. Supply Chain - NVIDIA reported total revenue of $57.006 billion in Q3 2025, with data center product revenue reaching $51.215 billion, marking a historical peak with a quarter-on-quarter growth of 24.62% and a year-on-year growth of 66.44%, accounting for over 89% of total revenue [4]. - TSMC's revenue for December 2025 was 335 billion new Taiwan dollars, a year-on-year increase of 20.4% but a quarter-on-quarter decline of 2.5%, achieving a record high for the same period [4]. - The CPU price index rose to 99.04 in November 2025, up from 98.20 in October, while DRAM spot prices surged from $27.14 on November 17, 2025, to $71.25 by January 23, 2026, reflecting a significant increase of over 178% within two months [4]. - South Korea's semiconductor exports reached $10.73 billion from January 1 to January 20, 2026, representing a substantial year-on-year growth of 70.2% and accounting for 29.5% of total exports, an increase of 9.6 percentage points compared to the previous year [4]. Application Side - The number of models in use is steadily increasing, with token usage from January 13 to January 19, 2026, reaching 7.50 trillion, a slight decrease of 1.96% [5]. - The release of new models such as Grok4Fast, GPT-5nano, and gpt-oss-20B in Q3 2025 led to a decline of over 50% in the price of tokens for models scoring above 40 on the Artificial Analysis intelligence index [5]. Investment Recommendations - The construction of data centers is expected to drive demand for HVDC and SST technologies, with an anticipated global increase of approximately 14 GW in data center installations in 2024. Major cloud providers are expected to maintain high capital expenditures, with TSMC's capital expenditures projected to reach $52-56 billion in 2026, a year-on-year increase of about 30% [6]. - The increasing power density of data center cabinets is likely to enhance the penetration of HVDC and SST technologies, with smart busbars expected to see widespread adoption [6]. - Recommended stocks include Zhongheng Electric (002364), Oulu Tong (300870), Weiteng Electric (688226), and Sunshine Power (300274), with additional attention suggested for Kehua Data (002335), Keda (002518), Kelu Electronics (002121), Magmi Tech (002851), Jinpan Technology (688676), and Sifang Co. (601126) [6].

Core Viewpoint - The article addresses concerns regarding the carbon dioxide (CO2) concentration levels in high-speed train carriages, clarifying that the reported levels exceed standard limits due to a misunderstanding of applicable regulations [3]. Group 1: Standards and Regulations - The CO2 concentration control standard for passenger trains in China is governed by TB/T 3493-2017, which sets the limit at 2500 ppm under normal operating conditions [3]. - In comparison, European standards (EN13129-2016) allow for a CO2 concentration limit of up to 5000 ppm for passenger trains [3]. - The reported passenger measurements referenced the GB 50736-2012 standard for civil buildings, which is not applicable to passenger trains [3]. Group 2: Train Design and Air Quality Management - High-speed trains are designed with fully sealed car bodies, and air exchange is managed entirely by the air conditioning ventilation system, providing a fresh air volume of over 15 m³/h per person [4]. - The trains achieve an air exchange rate of 6 to 12 times per hour, and are equipped with a pressure protection system [4]. - During normal operation outside of tunnels, CO2 levels typically do not exceed 1500 ppm; however, in tunnels, the system temporarily closes external air passages to prevent pressure fluctuations, which may cause a short-term increase in CO2 levels without impacting passenger health [4].

陶桂东介绍，网传旅客实测值对照的是我国GB 50736-2012《民用建筑供暖通风与空气调节设计规范》 的民用建筑室内二氧化碳浓度限值标准，该标准不适用于旅客列车。各国旅客列车浓度标准限值均是依 据移动运载装备的内部压力波动、二氧化碳浓度等综合舒适性指标设定的。 2026年1月23日，针对网传"乘客实测高铁车厢内二氧化碳浓度超过标准限值1000ppm"的信息，记者采 访了来自中车青岛四方机车车辆股份有限公司的动车组专家陶桂东。 陶桂东介绍，轨道交通移动装备有其特殊性，我国旅客列车室内二氧化碳浓度控制标准执行TB/T 3493- 2017《铁道车辆空调 空调压力保护装置》，正常运行工况下标准限值为不超过2500ppm，欧洲 EN13129-2016《铁路设施主干线铁路机车车辆用空调舒适度参数和型式试验》规定旅客列车室内二氧 化碳浓度标准限值为不超过5000ppm。 环球时报记者 郭媛丹 陶桂东介绍，动车组列车为全气密车体，车内换气完全由空调通风系统实现，人均新风量超过15m³/h （每小时立方米），每小时换气次数为6至12次，同时动车组配置有压力保护系统。在非隧道区段运行 时，可实现连续换气，二氧化碳浓度一般不 ...