Core Viewpoint - The maritime equipment sector experienced a rise of 1.41% on December 25, with Hailanxin leading the gains, while the Shanghai Composite Index closed at 3959.62, up 0.47% [1] Group 1: Market Performance - The maritime equipment sector's individual stock performance is as follows: - Hailanxin (300065) closed at 18.26, up 2.82% with a trading volume of 475,700 shares and a transaction value of 864 million yuan - China Shipbuilding (600150) closed at 33.84, up 1.41% with a trading volume of 490,600 shares and a transaction value of 1.653 billion yuan - China Ship Defense (600685) closed at 28.48, up 2.15% with a trading volume of 226,200 shares and a transaction value of 641 million yuan [1] Group 2: Capital Flow - The maritime equipment sector saw a net inflow of 51.206 million yuan from main funds, while retail investors contributed a net inflow of 99.793 million yuan, and there was a net outflow of 151 million yuan from speculative funds [1] - The capital flow for individual stocks is detailed as follows: - China Shipbuilding (600150) had a net inflow of 83.133 million yuan from main funds, while speculative funds saw a net outflow of 58.197 million yuan - Hailanxin (300065) experienced a net inflow of 74.681 million yuan from main funds, with a net outflow of 65.424 million yuan from speculative funds [2]

Group 1 - The company emphasizes the importance of market value management and has established a "Market Value Management System" in accordance with relevant laws and regulations [2] - The company commits to strictly follow the guidelines for market value management and aims to continuously deepen and strengthen related efforts [2]

Economic News - The State-owned Assets Supervision and Administration Commission emphasized the need for central enterprises to enhance budget management and cost control across all aspects of operations [2] - The National Development and Reform Commission and the National Energy Administration aim for a total installed capacity of 15 million kilowatts for solar thermal power by 2030, with costs comparable to coal power [2] - The Ministry of Housing and Urban-Rural Development proposed measures to promote the sale of existing homes and optimize affordable housing supply [2] - The General Administration of Customs conducted research on cutting-edge technology development and technology transfer [2] - The Hainan Free Trade Port has begun exporting self-produced goods with a value of 32,000 yuan, benefiting from over 12% cost savings [2] - The Shanghai Municipal Finance Bureau announced a subsidy for pig income insurance, with the municipal government covering 50% of the premium [2] - The U.S. economy showed a revised annualized GDP growth of 4.3% in Q3, exceeding expectations [2] - Japan reported a leak of radioactive water from a new reactor, with ongoing investigations into external radiation exposure [2] - Brazil confirmed anti-dumping duties on automotive glass from China, with specific rates for Malaysian producers [2] - South Korea's BC Card completed a pilot project for stablecoin payments, allowing foreign users to pay local merchants [2] Company Insights - Haibo Technology plans to invest 2 billion yuan in a smart green energy storage factory, expected to be completed by December 2028 [6] - Zhenyu Technology's subsidiary signed a strategic cooperation agreement to invest at least 1 billion yuan in projects related to new energy vehicle components and humanoid robots [6] - Huaxin Cement's major shareholder plans to increase its stake in the company by 200 million to 400 million yuan within six months [6] - Biological Shares' major shareholder intends to increase its stake by 50 million to 100 million yuan over the next year [6] Industry Strategy Agriculture Sector - The report suggests focusing on three main investment lines for the agriculture sector in 2026, with an emphasis on pig farming, feed, and pet food [7][9][10] - The pig farming industry is expected to see a gradual improvement in supply-demand dynamics, with a focus on cost management as a key factor for long-term growth [7] - The report highlights the potential for leading companies like Muyuan Foods to benefit from improved valuations and market conditions [8] Feed and Veterinary Medicine - The veterinary medicine sector is shifting towards innovation, with companies that prioritize R&D expected to thrive [9] - The feed industry is anticipated to see stable demand supported by high livestock inventory, with leading companies likely to gain market share [9] Pet Food Market - The domestic pet food market is projected to grow, with local brands gaining market share despite tariff disruptions [10][11]

北京中科海讯数字科技股份有限公司（以下简称"公司"）于 2025 年 8 月 25 日召开第四届董事会第七次会议，并于 2025 年 9 月 12 日召开 2025 年第三次 临时股东大会，审议通过了《关于修订<公司章程>的议案》。具体内容详见公司 分别于 2025 年 8 月 27 日及 2025 年 9 月 12 日在巨潮资讯网（www.cninfo.com.cn） 披露的《第四届董事会第七次会议决议公告》（公告编号：2025-078）、《关于修 订<公司章程>及修订、制定公司部分治理制度的公告》（公告编号：2025-084） 及《2025 年第三次临时股东大会决议公告》（公告编号：2025-091）。 根据上述会议决议，公司近日向北京市海淀区市场监督管理局提交了章程备 案申请并取得了准予备案的《备案通知书》，公司已完成本次章程的备案登记手 续 。 本 次 修 订 后 的 《 公 司 章 程 》 已 于 2025 年 8 月 27 日 在 巨 潮 资 讯 网 （www.cninfo.com.cn）披露。 特此公告。 北京中科海讯数字科技股份有限公司 证券代码：300810 证券简称：中科海讯 公告编号：2 ...

Core Viewpoint - Zhongke Haixun's stock price has shown significant volatility, with a year-to-date increase of 100.21%, but recent trends indicate a decline over the past 20 and 60 days [1][2]. Financial Performance - For the period from January to September 2025, Zhongke Haixun reported operating revenue of 145 million yuan, a year-on-year decrease of 0.41%, while the net profit attributable to shareholders was -76.92 million yuan, reflecting a year-on-year increase of 16.27% [2]. Stock Market Activity - As of December 22, Zhongke Haixun's stock price was 38.46 yuan per share, with a market capitalization of 4.54 billion yuan. The stock experienced a net inflow of 111,400 yuan from main funds, with significant buying and selling activity [1]. - The company has appeared on the "Dragon and Tiger List" six times this year, with the most recent instance on August 19, where it recorded a net purchase of approximately 39.99 million yuan [1]. Shareholder Information - As of December 10, the number of shareholders for Zhongke Haixun was 20,200, a decrease of 5.20% from the previous period, with an average of 5,634 circulating shares per shareholder, an increase of 5.49% [2]. - The company has distributed a total of 20.72 million yuan in dividends since its A-share listing, with 7.02 million yuan distributed over the past three years [3]. Institutional Holdings - As of September 30, 2025, notable institutional shareholders include Changcheng Jiujia Innovation Growth Mixed A, which holds 3.28 million shares, and several new entrants such as Yongying Ruixin Mixed A and Yongying Jianjian Enhanced Bond A [3].

Group 1 - The marine equipment sector increased by 1.55% on December 19, with Tianhai Defense leading the gains [1] - The Shanghai Composite Index closed at 3890.45, up 0.36%, while the Shenzhen Component Index closed at 13140.22, up 0.66% [1] - Key stocks in the marine equipment sector showed varied performance, with Tianhai Defense closing at 7.75, up 1.97%, and Jianglong Shipbuilding closing at 19.36, down 0.21% [1] Group 2 - The marine equipment sector experienced a net outflow of 16.086 million yuan from institutional investors and 41.6625 million yuan from retail investors, while individual investors saw a net inflow of 57.7484 million yuan [1] - Detailed fund flow data indicates that Zhongchuan Defense had a net inflow of 20.0552 million yuan from institutional investors, while Jianglong Shipbuilding faced a significant net outflow of 47.269 million yuan [2] - The overall fund flow dynamics show a mixed sentiment, with some stocks attracting retail interest despite institutional outflows [2]

Group 1 - The mechanical sector has shown strong performance in 2025, with the Shenwan Mechanical Equipment Index rising by 36.11%, outperforming the Shanghai Composite Index by 19.74 percentage points and the Shenzhen Component Index by 8.78 percentage points [4][16][19] - In the first three quarters of 2025, the mechanical industry reported revenues of 15,135.34 billion yuan, a year-on-year increase of 7.35%, and a net profit attributable to shareholders of 1,080.76 billion yuan, up 16.80% year-on-year [4][22][27] - The public fund allocation ratio for the mechanical equipment sector increased by 0.25 percentage points in Q3 2025 compared to Q3 2024, indicating improved fundamentals and positive policy impacts [29] Group 2 - The equipment manufacturing industry has maintained export resilience, with significant growth in new overseas markets. From January to October 2025, the export delivery value of general equipment, specialized equipment, and transportation equipment reached 6,173.20 billion yuan, 5,319.30 billion yuan, and 4,124 billion yuan respectively, with year-on-year growth rates of 5.5%, 9.3%, and 24.20% [5][33][36] - The overseas sales of engineering machinery continued to grow, with a year-on-year increase of 11.84% in export value from January to October 2025, driven by technological innovation and diversified market strategies [37][41] - The motorcycle industry has established a strong competitive advantage in overseas markets, with exports reaching 1,101.85 million units and 7.278 billion USD in value from January to October 2025, reflecting a year-on-year increase of 22.28% and 28.2% respectively [42][43] Group 3 - The emergence of new manufacturing scenarios signifies a profound transformation from "single technology upgrades" to "systematic ecological restructuring," enhancing production efficiency, product quality, and innovation capabilities [5][46] - Human-shaped robots are expected to address customization challenges in traditional manufacturing, with a market space projected to expand significantly as they transition from industrial applications to household use [47][54] - The intelligent logistics equipment market in China is expected to grow rapidly, with a projected market size of 1,261 billion yuan in 2025, driven by advancements in IoT and AI technologies [64][72]

Core Viewpoint - The maritime equipment sector experienced a decline of 1.48% on December 15, with Jianglong Shipbuilding leading the losses. The Shanghai Composite Index closed at 3867.92, down 0.55%, while the Shenzhen Component Index closed at 13112.09, down 1.1% [1]. Sector Performance - The following companies in the maritime equipment sector reported their closing prices and percentage changes: - Yaxing Dilian (601890): Closed at 10.35, down 0.86% with a trading volume of 326,400 shares and a turnover of 337 million yuan [1]. - China Shipbuilding (600150): Closed at 33.81, down 1.17% with a trading volume of 434,400 shares and a turnover of 1.475 billion yuan [1]. - Zhongli Haixun (300810): Closed at 37.96, down 1.30% with a trading volume of 24,000 shares and a turnover of 91.59 million yuan [1]. - Zhongla Defense (600685): Closed at 28.75, down 1.74% with a trading volume of 212,300 shares and a turnover of 616 million yuan [1]. - Guorui Technology (300600): Closed at 15.08, down 1.95% with a trading volume of 62,400 shares and a turnover of 94.73 million yuan [1]. - China Haifang (600764): Closed at 26.48, down 2.03% with a trading volume of 98,700 shares and a turnover of 264 million yuan [1]. - Tianhai Defense (300008): Closed at 8.01, down 2.32% with a trading volume of 1,384,600 shares and a turnover of 1.113 billion yuan [1]. - Hailanxin (300065): Closed at 17.85, down 3.25% with a trading volume of 354,500 shares and a turnover of 638 million yuan [1]. - Jianglong Shipbuilding (300589): Closed at 20.19, down 8.93% with a trading volume of 604,500 shares and a turnover of 1.245 billion yuan [1]. Capital Flow - The maritime equipment sector saw a net outflow of 623 million yuan from main funds, while retail investors contributed a net inflow of 666 million yuan. Speculative funds experienced a net outflow of 42.67 million yuan [1].

证券时报·数据宝统计，截至发稿，中科海讯最新股价为38.30元，下跌0.42%，本期筹码集中以来股价 累计下跌3.62%。具体到各交易日，5次上涨，6次下跌。 中科海讯12月15日披露，截至12月10日公司股东户数为20230户，较上期（11月30日）减少1110户，环 比降幅为5.20%。这已是该公司股东户数连续第2期下降。 （文章来源：证券时报网） 公司发布的三季报数据显示，前三季公司共实现营业收入1.45亿元，同比下降0.41%，实现净利 润-7692.22万元，同比增长16.27%，基本每股收益为-0.6599元。（数据宝） ...

Investment Rating - The report does not explicitly state an investment rating for the underwater communication industry Core Insights - Underwater communication is primarily achieved through acoustic waves, which are currently the only viable means for medium to long-distance wireless communication in marine environments due to the high attenuation of electromagnetic and optical waves in seawater [4][5] - The underwater communication technology is experiencing significant advancements towards networking, intelligence, and comprehensive development, with a focus on low-energy routing protocols and the integration of artificial intelligence [13][14] Summary by Sections Underwater Communication Overview - Underwater wireless communication involves transmitting data through wireless carriers in aquatic environments, categorized into underwater electromagnetic, optical, and acoustic communication [2] - Acoustic communication is highlighted as the most effective method for underwater data transmission, capable of long-range communication with minimal attenuation [4] Challenges in Underwater Acoustic Communication - Major challenges include absorption attenuation, long delays, strong multipath effects, and interference from ocean noise [8][10] - The available bandwidth for long-distance underwater acoustic communication systems is often less than 1 kHz, limiting communication rates [9] Applications of Underwater Acoustic Communication - In the civilian sector, applications include marine surveys, underwater engineering, and seabed resource development, significantly enhancing data acquisition and safety monitoring [11] - In military applications, it facilitates two-way communication between surface ships and submarines, as well as anti-submarine warfare networks [12] Market Competition Landscape - The Chinese underwater acoustic communication industry is characterized by a diverse competitive landscape dominated by state-owned research institutions and military enterprises, with a rapid rise of private companies [16] - Key players include Harbin Engineering University, Chinese Academy of Sciences, and various enterprises like China Marine Defense and Wisdom Ocean Technology, which are driving innovation and market growth [17]