本公司董事会及全体董事保证本公告内容不存在任何虚假记载、误导性陈 述或者重大遗漏，并对其内容的真实性、准确性和完整性承担法律责任。 重要内容提示： 上海港湾基础建设（集团）股份有限公司 股票交易风险提示公告 证券代码：605598 证券简称：上海港湾 公告编号：2025-055 公司股票交易价格于 2025 年 12 月 23 日、12 月 24 日、12 月 25 日连续 3 个 交易日收盘价格涨幅偏离值累计达到 20%。2025 年 12 月 26 日，公司股票再次 涨停。现将公司相关事项和风险说明如下： 一、生产经营风险 公司目前日常生产经营活动正常，主营业务未发生重大变化。 2025 年 10 月 31 日，公司在上海证券交易所网站（www.sse.com.cn）披露 了《2025 年第三季度报告》，2025 年前三季度实现归属于上市公司股东的净利 润为 7,920.30 万元，同比下降 27.25%，归属于上市公司股东的扣除非经常性损 益的净利润为 7,780.54 万元，同比下降 25.54%,以上数据未经注册会计师审计。 公司不存在应披露而未披露的重大信息，不存在影响公司股票交易价格异 常波动的 ...

Market Performance - The market experienced a slight increase with the Shanghai Composite Index rising by 0.1%, marking an 8-day consecutive gain [1] - The Shenzhen Component Index increased by 0.54%, while the ChiNext Index rose by 0.14% [1] - The total trading volume in the Shanghai and Shenzhen markets reached 2.16 trillion yuan, an increase of 235.7 billion yuan compared to the previous trading day [1] Sector Highlights - The commercial aerospace sector saw a significant surge, with companies like Shenjian Co., Ltd. (002361) achieving a 7-day consecutive rise and China Satellite (600118) recording a 3-day consecutive increase [1] - The lithium battery supply chain strengthened, with Tianji Co., Ltd. (002759) achieving 3 gains in 4 days, and other companies like Fulu Technology (000973) and Fengyuan Co., Ltd. (002805) hitting the daily limit [1] - The Hainan Free Trade Zone concept remained active, with Hainan Development (002163) achieving 5 gains in 6 days [1] - The Fujian sector saw localized gains, with Xiamen International Trade (600755) achieving 3 consecutive gains [1] Declining Sectors - The paper, liquor, and computing hardware sectors experienced notable declines, with the computing hardware concept showing weakness, particularly Changguang Huaxin, which fell over 11% [1]

Summary of Key Points from Conference Call Industry Overview - The commercial aerospace sector is expected to see significant investment opportunities by the end of the year, with a clear turning point in the industry's fundamentals and substantial long-term growth potential driven by overseas satellite concepts and the anticipated IPO of SpaceX [1][2]. Core Insights and Arguments - The current commercial aerospace market is driven by the concept of space computing centers, with increased market tolerance for short-term performance, focusing on high elasticity and anti-deflation characteristics in satellite-related companies [1]. - The fifth satellite project involves various chemical materials, with a significant market potential for ceramic shells, estimated at around 1 million yuan per satellite, leading to a potential market space of 10 billion yuan [1][9]. - The commercial aerospace sector is transforming the construction industry, with companies like Shanghai Port and Dongzhu Ecology making breakthroughs in satellite energy management systems and rocket factory projects [1][10]. Investment Directions - Key investment areas in the satellite sector include high elasticity and anti-deflation targets, particularly in payload antennas, power platforms, and new infrastructure [5][6]. - Companies involved in antenna technology, such as Zhenlei, Chengchang, Canqin, and Tongyu Xinke, are highlighted as important investment opportunities [5]. Mechanical Manufacturing Sector - The mechanical manufacturing sector in commercial aerospace focuses on launch site equipment, consumables, and rocket and satellite structural components, with notable companies including Anhui Heli, Hengli Hydraulic, CIMC Anrui, and Hailan [11]. Aerospace Electronics - Aerospace Electronics is a core leader in the aerospace technology group, providing critical communication and control equipment for domestic satellites and leading in laser communication technology [3][17]. - The company achieved revenue of 14 billion yuan last year, with a significant portion coming from military products and aerospace electronics [17]. Future Market Trends - The future market for aerospace electronics is promising, with the company expected to maintain a high market share due to its technological advantages and capabilities in mass production of precision components [19]. - The commercial aerospace sector is anticipated to expand into various application scenarios, including satellite internet communication and space computing, supported by policy directives [22]. Security in Satellite Internet - Shengbang Security is positioned as a standard setter for satellite internet security modules, having developed a 200G high-speed communication encryption gateway, enhancing satellite communication security [24]. - The company has made significant investments and acquisitions to strengthen its product offerings in satellite internet security [24]. Challenges and Opportunities - The commercial banking private network construction presents development opportunities, particularly in special fields under current policy guidance, with a notable demand for key components like radiation-resistant FPGA and Flash [27]. This summary encapsulates the essential insights and developments within the commercial aerospace industry and related sectors, highlighting investment opportunities, market trends, and key players.

Group 1 - The Ministry of Commerce of China has expressed strong opposition to the U.S. decision to impose 301 tariffs on certain Chinese semiconductor products, stating that it does not recognize the conclusions of the U.S. investigation and has lodged formal protests through the China-U.S. economic and trade consultation mechanism [1] - The Ministry of Commerce also emphasized its commitment to maintaining global supply chain security and facilitating compliant trade regarding rare earth magnet exports, despite existing restrictions [1] - The Shanghai Stock Exchange has announced the scheduled disclosure dates for 2025 annual reports, with Chipway Technology set to disclose on February 3, 2026, followed by *ST Huawang on February 13, 2026, and Shangwei Co. on February 14, 2026 [1] Group 2 - The State Administration for Market Regulation has identified issues related to the "Antarctic Krill Oil" incident, highlighting non-compliance in the contract manufacturing practices of some companies, and plans to implement new regulations to enhance supervision of food safety responsibilities [2] - The National Development and Reform Commission is set to hold a press conference on December 26 to discuss the work related to the National Venture Capital Guidance Fund [3] Group 3 - The National Press and Publication Administration has approved 144 domestic online games for December 2025 [4] - The Shanghai Municipal Government has issued a plan to strengthen the open-source system, aiming to establish a competitive open-source innovation hub by 2027, with goals including the cultivation of 100 commercial open-source enterprises and the incubation of over 200 quality open-source projects [4] Group 4 - The Guangzhou Municipal Government has released 18 measures to support the development of the gaming and esports industry, including incentives for technological innovation and support for projects achieving significant breakthroughs in gaming technology [5] - A team from the National University of Defense Technology has set a new global record for superconducting magnetic levitation speed, accelerating a test vehicle weighing tons to 700 km/h in just two seconds [5] - Major silicon wafer manufacturers have significantly raised their prices, with average increases reaching 12%, attributed to substantial price hikes in upstream silicon materials [5] Group 5 - Shanghai Port Bay (605598) reported that its commercial space business and perovskite solar business will account for less than 1% of its revenue in 2024 [6] - Huadian Technology (601226) has signed a contract worth 265 million yuan for six major pipelines for a supercritical power plant [6] - Yichang Technology (002420) will resume trading on December 26 after the Chuzhou State-owned Assets Supervision and Administration Commission becomes its actual controller [6] Group 6 - Unisoc (002049) plans to establish a new company with a subsidiary of CATL to engage in automotive domain control chip business [7] - Baina Chancheng (300291) intends to acquire 100% of Zhonglian Century's shares and will resume trading on December 26 [7] - Zhongding Co. (000887) plans to set up a joint venture to manufacture humanoid robots [7] - Guangju Energy (000096) is set to collaborate with China General Nuclear Power Group in areas such as electricity sales and virtual power plants [7] - Zhongwei Co. (300919) has signed a strategic cooperation framework agreement with Xinwangda (300207) for solid-state battery development [7]

Core Viewpoint - Shanghai Port Bay (605598) announced on December 25 that its main business remains unchanged, focusing on foundation treatment and pile foundation engineering, despite recent stock trading fluctuations [1] Financial Performance - As of the audited financial data for 2024, the commercial aerospace and perovskite solar energy businesses contribute less than 1% to the company's revenue, indicating a small scale and lack of profitability [1] - The aforementioned activities do not have a substantial impact on the company's current main business operations [1]

上海港湾基础建设（集团）股份有限公司 股票交易异常波动公告 本公司董事会及全体董事保证本公告内容不存在任何虚假记载、误导性陈 述或者重大遗漏，并对其内容的真实性、准确性和完整性承担法律责任。 证券代码：605598 证券简称：上海港湾 公告编号：2025-054 重要内容提示： 上海港湾基础建设（集团）股份有限公司（以下简称"公司"）股票于 2025 年 12 月 23 日、12 月 24 日、12 月 25 日连续 3 个交易日收盘价格涨幅偏离 值累计超过 20%，根据《上海证券交易所交易规则》的有关规定，属于股票交 易异常波动情形。 经公司自查，并书面问询公司控股股东及实际控制人，截至本公告披露 日，公司、控股股东及实际控制人不存在应披露而未披露的重大信息。 二级市场交易风险：公司静态市盈率、滚动市盈率、市净率显著高于同 行 业 上 市 公 司 平 均 水 平 。 截 至 2025 年 12 月 25 日 ， 根 据 中 证 指 数 网 (www.csindex.com.cn)发布的数据，公司所属行业为"E 建筑业"门类下的 "E48 土木工程建筑业"最新静态市盈率为 7.54，最新滚动市盈率为 8.03 ...

Core Viewpoint - The company, Shanghai Port Bay, has issued a statement clarifying that its main business remains unchanged, focusing on geotechnical engineering services such as foundation treatment and pile foundation engineering, despite recent market fluctuations [2]. Financial Performance - As per the audited financial data for 2024, the commercial aerospace and perovskite solar energy businesses contribute less than 1% to the company's total revenue, indicating a small scale and lack of profitability [2]. - The aforementioned businesses do not have a substantial impact on the current operations of the company's main business [2].

Core Viewpoint - The company's stock experienced an abnormal fluctuation with a cumulative closing price deviation exceeding 20% over three consecutive trading days from December 23 to 25, 2025, indicating potential volatility in the market [1] Financial Performance - As of December 25, 2025, the company's static and rolling price-to-earnings (P/E) ratio and price-to-book (P/B) ratio are significantly higher than the industry average [1] - For the first three quarters of 2025, the company reported a net profit of 79.203 million, a year-on-year decrease of 27.25%, and a non-recurring net profit of 77.805 million, down 25.54% year-on-year [1] Business Segments - The commercial aerospace and perovskite solar energy businesses accounted for less than 1% of total revenue in 2024 and have not yet turned a profit [1]

Core Viewpoint - "Space computing power" is not merely a concept hype but is rooted in profound industrial evolution logic, addressing the limitations of traditional satellites in data processing and transmission efficiency. Group 1: Key Companies and Their Highlights - Shanghai Port (605598.SH) focuses on lightweight, high-temperature resistant perovskite batteries to meet the energy needs of computing satellites, with a latest stock price of 61.90 yuan and a daily increase of +10.01% [1] - China Satellite (600118.SH) is the leading domestic satellite manufacturer with an annual production capacity of 200 small satellites, playing a key role in the national "Trinity Computing Constellation" project, with a latest stock price of 72.73 yuan and a daily increase of +10.00% [2] - Tongyu Communication (002792.SZ) provides the core satellite communication phased array antennas essential for signal transmission between satellites and ground stations, with a latest stock price of 38.18 yuan and a daily increase of +10.00% [3] - Aerospace Electronics (600879.SH) holds over 90% market share in onboard computers, with its AI processing modules enhancing satellite computing power from T-level to P-level, crucial for the "Trinity Computing Constellation" project, with a latest stock price of 18.61 yuan and a daily increase of +9.99% [4] - Fudan Microelectronics (688385.SH) is the only domestic company capable of mass-producing radiation-resistant FPGAs, providing hardware reliability for satellite computing modules, with a latest stock price of 75.20 yuan and a daily increase of +16.21% [5] Group 2: Additional Companies and Their Contributions - Aerospace Smart Equipment (300455.SZ) has over 70% market share in onboard computer systems for commercial satellites, with a latest stock price of 18.26 yuan and a daily increase of +10.44% [7] - Zhongke Star Map (688568.SH) has developed an integrated data processing platform that combines FPGA chips and AI algorithms for efficient space-based computing, with a latest stock price of 51.96 yuan and a daily increase of +7.11% [8] - Shanghai Huguang (603131.SH) is involved in commercial space launches with capabilities for multi-satellite launches, aligning with the needs of computing constellations, with a latest stock price of 29.88 yuan and a daily increase of +6.71% [9] - Shunhao Co., Ltd. (002565.SZ) has invested in Beijing Orbit Chen Guang, focusing on the construction of giant computing satellite constellations, with a latest stock price of 15.56 yuan and a daily increase of +5.99% [10] - Qianzhao Optoelectronics (300102.SZ) has achieved a solar cell conversion efficiency of 28%, providing stable energy support for space computing devices, with a latest stock price of 24.62 yuan and a daily increase of +5.62% [11]

| 代码 | 名称 | 收盘价 | 涨跌幅 | 成交量(手) | 成交额(元) | | --- | --- | --- | --- | --- | --- | | 605598 | 一海港澳 | 61.90 | 10.01% | 10.70万 | 6.51亿 | | 603163 | 圣晖集成 | 85.92 | 10.00% | 7.23万 | · 5.86亿 | | 603098 | 森特股份 | 14.29 | 5.77% | 22.31万 | 3.24亿 | | 002593 | 日上集团 | 6.46 | 5.73% | 117.66万 | 7.62亿 | | 605178 | 时空科技 | 54.67 | 2.86% | 10.34万 | 5.60亿 | | 603637 | 镇海股份 | 11.04 | 2.70% | 5.24万 | 5743.75万 | | 600477 | 杭萧钢构 | 2.72 | 2.26% | 35.28万 | 9451.19万 | | 601133 | 柏诚股份 | 17.85 | 2.12% | 48.46万 | 8.44亿 | | 000065 | 北方国际 | ...