新华社北京1月24日电 24日，针对近日网络上"乘客实测高铁车厢内二氧化碳浓度超过1000ppm是否超 标"的讨论，记者采访了来自动车组制造厂商、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。 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。 陶桂东介绍，作为全气密车体，动车组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 ...

我国旅客列车室内二氧化碳浓度标准限值为2500ppm，限值内浓度对旅客健康无影响。 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，网传旅客实测值对照的是我国GB 50736- 201 2《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。 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超过1500ppm；当 通过连续隧道群时，为降低外界空气压力波动导致的旅客耳鸣，列车会采取压力保护动作 关闭与车外空气的通道，此时无法实现车内外空气交换，车厢内二氧化碳浓度短时间内会 有所升高，不会对旅客健康产生影响。 来源：环球网 End 陶桂东介绍，轨道交通移动装备有其特殊性， ...

【专家澄清：#我国旅客列车室内二氧化碳浓度没超标#】#高铁二氧化碳浓度无需过度恐慌#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。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。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 ...

Core Insights - The AI Fund Changjiang New Energy Industry Mixed A (011446) reported a profit of 12.24 million yuan for Q4 2025, with a weighted average profit per fund share of 0.1594 yuan. The fund's net value growth rate for the reporting period was 10.18%, and the fund size reached 123 million yuan by the end of Q4 2025 [2][13]. Fund Performance - As of January 21, the fund's unit net value was 1.932 yuan. Over the past year, the fund achieved a cumulative growth rate of 76.8%, outperforming its peers [2]. - The fund's performance over different time frames includes a 27.27% growth rate over the past three months, ranking 7 out of 621 comparable funds, and a 59.78% growth rate over the past six months, ranking 27 out of 621 [3]. Investment Strategy - The fund focuses on the new energy industry and its upstream and downstream sectors, seeking opportunities in supply-demand reversals and technological advancements within the industry. The management plans to continue tracking and identifying investment opportunities in these areas [2]. Risk Metrics - The fund's Sharpe ratio over the past three years is 0.6629, ranking 173 out of 526 comparable funds [7]. - The maximum drawdown over the past three years was 43.48%, with the largest single-quarter drawdown occurring in Q2 2022 at 21.13% [9]. Portfolio Composition - As of December 31, the fund's average stock position over the past three years was 78.37%, compared to the industry average of 85.83%. The fund reached its highest stock position of 86.26% at the end of 2021 and its lowest of 72.55% by the end of Q3 2024 [12]. - The top ten holdings of the fund include Tianqi Lithium, Huayou Cobalt, CATL, Tianhua New Energy, Yongxing Materials, China National Materials, Liyuanheng, Guoci Materials, Sifang Co., and Keda Technology [16].

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，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表示，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。 视频拍摄者余先生介绍，在最近一次的长途旅行中，余先生用仪器测量了高铁二等座车厢内的二氧化碳 浓度，车辆行驶时已经超过了2000ppm。 去年6月，"难怪我一上高铁就睡觉"相关话题就在社交平台引发热议，有网友测评称，在高铁车厢内随 着人流量增加车内二氧化碳含量逐渐增高。有网友称，缺氧会让人感觉昏昏欲睡。据中新经纬，铁路 12306一位客服表示，高铁车厢虽然是密闭空间，但在行驶过程中中央空调在保持恒温的前提下会实时 更换空气，提供氧气，（所以）即便是长时间行驶乘客也不会出现缺氧的情况。 智通财经记者 邵冰燕 陶桂东介绍，动车组列车为全气密车体，车 ...

Summary of Key Points from Conference Call Records Industry Focus: Electric Vehicle and Energy Storage Sector Core Insights and Arguments 1. The electric vehicle and energy storage sectors are structurally improving, benefiting companies like CATL and EVE Energy. Recent announcements from multiple automakers reveal ambitious sales targets for 2026, including: - Leap Motor: 1 million units, a year-on-year increase of approximately 67.6% - NIO: 456,400 to 489,000 units, a year-on-year increase of 40% to 50% - Xiaomi Auto: 550,000 units, a year-on-year increase of approximately 34% - Hongmeng Zhixing: 1 million to 1.3 million units, with an upper limit year-on-year increase of approximately 120% [1][2] 2. According to Xinluo Lithium Battery data, global lithium battery production is expected to reach 2,297 GWh by 2025, a year-on-year increase of 48.5%. The core sources of growth will be: - Power batteries: 1,495 GWh, a year-on-year increase of 40.5% - Energy storage batteries: 636 GWh, a year-on-year increase of 92.7%, with a market share exceeding 27% [2] 3. CATL has signed a five-year strategic cooperation memorandum with Changan Automobile, focusing on advanced fields such as battery swapping, smart automotive robotics, flying cars, and embodied intelligence [2]. Upstream Lithium Carbonate Supply and Demand 1. The supply and demand for lithium carbonate continue to improve, benefiting companies like Salt Lake Industry and Dazhong Mining. By 2025, China's lithium carbonate production is projected to reach 976,300 tons, a year-on-year increase of 49%. The proportion of spodumene production is rising, while mica production is expected to decline significantly due to policy adjustments. The lithium carbonate market is anticipated to maintain a tight balance in 2026, with price centers expected to rise [3]. 2. Dazhong Mining plans to invest 3.688 billion yuan in a lithium mining project in Hunan, which is expected to produce approximately 80,000 tons of lithium carbonate annually upon reaching full capacity [3]. 3. The global solid-state battery sector is entering a critical phase of engineering and industrialization, with companies like Xiamen Tungsten and Putailai poised to benefit. Recently, Dongfeng Motor has initiated cold weather testing for solid-state batteries [3]. Industry Focus: Photovoltaic and Energy Storage Sector Key Developments 1. Investment in the power grid and AI-driven demand for electrical equipment are on the rise, benefiting companies like Sungrow Power Supply, Sieng Electric, and Sifang Co. The State Grid has announced a fixed asset investment of 4 trillion yuan for the 14th Five-Year Plan period (2026-2030), a 40% increase compared to the previous plan. The core objective is to support carbon peak by 2030 and to initially establish a new energy system [4]. 2. Smart microgrids are expected to be a key focus in 2026, with their core value lying in utilizing energy storage technology (especially grid-connected storage) to address renewable energy consumption and improve power supply reliability in remote areas [4].

Investment Rating - The report maintains a strong buy rating for several key companies in the power equipment sector, including Guodian Nanrui, Siyuan Electric, and TBEA, while recommending an increase in holdings for others like Sifang Co. and China XD Electric [2][3]. Core Insights - The State Grid's planned investment of 4 trillion yuan during the 14th Five-Year Plan period represents a 40% increase compared to the previous plan, with an expected compound annual growth rate (CAGR) of 7% [1][9]. - The focus of this investment will be on green transformation, ultra-high voltage, distribution networks, energy storage, and digitalization, which is expected to significantly support the performance of related companies [1][9]. - The report highlights the increasing pressure on power consumption and the need for a new power system, emphasizing ultra-high voltage and energy storage as critical solutions to address this challenge [1][13][21]. Industry Overview - The total number of listed companies in the power equipment sector is 308, with a total market capitalization of 7,728.9 billion yuan [3]. - The absolute performance of the power equipment and new energy sector has shown significant growth, with a 63.1% increase over 12 months [5]. Key Company Analysis - Guodian Nanrui is recognized as a leader in secondary equipment with strong technology barriers and stable operations, expected to see significant growth in high-voltage and system stability businesses [26]. - Siyuan Electric has established a comprehensive product system and service network in overseas markets, with a notable increase in overseas revenue [26]. - China XD Electric benefits from increased capital expenditure in domestic main networks and ultra-high voltage projects, with a growing presence in international markets [27]. - TBEA is experiencing rapid growth in orders, particularly in the Middle East and Europe, and is expected to benefit from ongoing power construction projects [28]. - Other notable companies include XJ Electric, Pinggao Electric, and Igor, each with unique strengths and growth prospects in the evolving power equipment landscape [29][30][31].

Summary of Conference Call Notes Industry Overview - The focus is on the AI power sector, specifically the transformer and AI power supply segments, which are identified as the most certain growth areas for 2026 [1][2]. Key Points 1. **Order and Performance Catalysts**: After 25 years of strategic positioning, leading companies in the AIDC (Artificial Intelligence Data Center) sector are expected to see sustained order growth and performance improvements in 2026, particularly in transformers and AI power supplies [1]. 2. **Transformer Demand**: There is a clear trend of electricity shortages in North America, which is anticipated to worsen in 2026. Transformers are identified as a critical component in addressing this shortage, with Chinese companies expected to become key players in increasing overseas production capacity and accelerating exports [1][2]. 3. **AI Power Supply Developments**: The core focus for AI power supplies in 2026 is on achieving significant milestones, particularly in high-voltage direct current (HVDC) systems, which are expected to transition from concept to implementation. Additionally, ongoing testing and sample submissions for solid-state transformers (SST) are noted [1]. 4. **Company-Specific Updates**: - **Siyuan Electric**: Anticipates over $100 million in orders from the U.S. in 2025, with expectations for explosive growth in transformers and AIS (Air Insulated Switchgear) in 2026 [2]. - **Igor**: Reports a 100% increase in North American orders in 2025, with close collaboration with T [2]. - **Jinpan Technology**: Progressing with framework orders from major overseas CSP (Concentrated Solar Power) clients [2]. - **Sifang Co.**: SST and V are entering the final stages of integration [2]. - **Kostad**: Noted an increase in UPS (Uninterruptible Power Supply) demand in North America, with new HVDC products and SST technology being developed [2]. - **Magmi Tech**: Reports successful scaling of orders and smooth sample submissions for new products [2]. Additional Important Insights - The emphasis on the AI power sector reflects a broader trend towards integrating AI technologies in energy solutions, indicating potential long-term growth opportunities in this industry [1][2]. - The strategic positioning of Chinese companies in the global market for transformers and AI power supplies suggests a shift in manufacturing capabilities and export dynamics, which could impact competitive landscapes [1].

Summary of Conference Call Notes Industry Overview - The focus is on the AI power sector, specifically the transformer and AI power supply segments, which are identified as the most certain growth areas for 2026 [1][1]. Key Points 1. **Long-term Outlook for AIDC**: After 25 years of development, it is anticipated that leading AIDC companies will see sustained order growth and performance in 2026, particularly in transformers and AI power supplies [1][1]. 2. **Transformer Demand**: There is a clear trend of electricity shortages in North America, which is expected to worsen in 2026. As a critical link in overseas production capacity, Chinese companies are projected to be the main contributors to future capacity increases, with exports likely to accelerate [1][1]. 3. **AI Power Supply Development**: The core focus for 2026 is on the transition from "0 to 1" in high-voltage direct current (HVDC) systems, with expectations for significant advancements. Additionally, the SST (Solid State Transformer) is currently undergoing testing and sample delivery, while internal power supplies are expected to see a continuous flow of orders [1][1]. Company-Specific Insights 1. **Siyuan Electric**: Anticipates over $100 million in orders from the U.S. in 2025, with expectations for explosive growth in transformers and AIS (Air Insulated Switchgear) in 2026 [2]. 2. **Igor**: Reports a 100% increase in North American orders in 2025, closely collaborating with T [2]. 3. **Jinpan Technology**: Progressing with framework orders from major overseas CSP (Concentrated Solar Power) clients [2]. 4. **Sifang Co.**: SST is entering the final stages of collaboration with V [2]. 5. **Kostad**: Experiencing growth in North American UPS (Uninterruptible Power Supply) market, launching HVDC and advancing SST technology [2]. 6. **Magnum**: Securing large-scale orders and successfully delivering new product samples [2].

Core Viewpoint - The A-share market for smart grid stocks has shown significant strength, with multiple companies experiencing substantial gains following the announcement of a major investment plan by the State Grid Corporation of China [1] Group 1: Market Performance - Smart grid stocks collectively surged, with notable gains including: - Shuangjie Electric up over 17% - Electric Power Research Institute up over 15% - Hongxiang Co., Huasu Technology up over 10% - Several other companies including Hanlan Co., Dalian Electric Porcelain, and others hitting the daily limit up [1] - The overall market sentiment is positive, driven by strong investment forecasts and demand in the sector [1] Group 2: Investment Outlook - The State Grid Corporation has projected a fixed asset investment of 4 trillion yuan during the 14th Five-Year Plan, a 40% increase compared to the previous plan, with an average annual investment of 800 billion yuan, indicating a compound annual growth rate (CAGR) approaching double digits [1] - Investment will focus on the construction of a new power system, aiming to enhance cross-regional and cross-provincial transmission capacity by over 30% compared to the end of the previous plan [1] Group 3: Export Growth - The North American market is experiencing a surge in demand for power equipment driven by aging infrastructure and increased electricity needs from AI data centers, leading to a significant rise in delivery times for transformers and high-voltage cables [1] - From January to November 2025, China's exports of transformers, high-voltage switches, and wires and cables are expected to grow by 35.3%, 29.4%, and 22.9% year-on-year, respectively, indicating a strong international market presence [1]