5月28日，上证指数全天窄幅震荡；深证成指、创业板指、科创50指数早盘窄幅震荡，午后震荡走低。 截至收盘，上证指数报3339.93点，跌0.02%，成交额3893.41亿元；深证成指报10003.27点，跌0.26%， 成交额6206.09亿元；创业板指报1985.38点，跌0.31%，成交额2722.07亿元；科创50指数报970.64点， 跌0.23%，成交额146.36亿元。沪深两市合计成交10099.5亿元，成交额较上一交易日增加110.24亿元。 环保、纺织服饰等行业走强 *ST赛隆连收8个涨停板 盘面上来看，行业板块、概念跌多涨少。其中，环保、纺织服饰、珠宝首饰、物流、煤炭等行业涨幅靠 前；可燃冰、医废处理、可控核聚变、啤酒、海工装备、黄金等概念走势活跃。化工、农林牧渔、国防 军工、汽车、房地产、计算机、教育、钢铁等行业跌幅居前；重组蛋白、环氧丙烷、空间站、转基因、 AI医疗、氟化工、BC电池、钛白粉等概念走势较弱。涨停个股主要集中在机械设备、化工、医药生 物、环保、电力设备等行业。 个股涨跌情况，截至收盘，沪深两市合计1695只个股上涨，3273只个股下跌，平盘个股151只，停牌的 个股28只。 ...

截至5月28日收盘，可燃冰概念上涨2.50%，位居概念板块涨幅第2，板块内，9股上涨，神开股份涨 停，潜能恒信、海默科技、中国石化等涨幅居前，分别上涨8.59%、5.58%、1.94%。跌幅居前的有新锦 动力、石化油服、泰山石油等，分别下跌0.54%、0.53%、0.16%。 今日涨跌幅居前的概念板块 | 概念 | 今日涨跌幅（%） | 概念 | 今日涨跌幅（%） | | --- | --- | --- | --- | | 医疗废物处理 | 2.66 | 环氧丙烷 | -1.90 | | 可燃冰 | 2.50 | 转基因 | -1.75 | | 乳业 | 2.02 | 兵装重组概念 | -1.73 | | 可控核聚变 | 1.88 | 光刻胶 | -1.60 | | 毛发医疗 | 1.41 | 大豆 | -1.56 | | 垃圾分类 | 1.39 | 成飞概念 | -1.55 | | 啤酒概念 | 1.14 | 氟化工概念 | -1.52 | | 海工装备 | 1.12 | CRO概念 | -1.50 | | 页岩气 | 0.98 | 细胞免疫治疗 | -1.45 | | 黄金概念 | 0.95 | POE胶 ...

Group 1 - The military equipment restructuring concept has seen a decline of 1.73%, ranking among the top declines in the concept sector, with companies like Hunan Tianyan, Changcheng Military Industry, and Construction Industry experiencing significant drops [1] - The military equipment restructuring concept faced a net outflow of 177 million yuan from main funds today, with seven stocks experiencing net outflows, and five stocks seeing outflows exceeding 10 million yuan [2] - The stock with the highest net outflow is Changan Automobile, which saw a net outflow of 110 million yuan, followed by Changcheng Military Industry, Hunan Tianyan, and Construction Industry with net outflows of 16.49 million yuan, 15.59 million yuan, and 15.03 million yuan respectively [2] Group 2 - The top gainers in the concept sector today include medical waste treatment with a gain of 2.66%, and combustible ice with a gain of 2.50%, while the military equipment restructuring concept was among the top losers [2] - The trading volume for Changan Automobile was 0.68%, while Changcheng Military Industry had a turnover rate of 2.04%, and Hunan Tianyan had a turnover rate of 6.62% [2] - The military equipment restructuring concept includes several companies, with notable declines in stock prices, indicating a challenging market environment for this sector [1][2]

Group 1 - The article discusses China's initiative to build the world's first 2000-meter deep-sea manned laboratory, aimed at exploring the unique cold seep ecosystems in the deep sea [3][8] - Cold seeps are described as vibrant ecosystems that thrive without sunlight, relying on chemosynthesis, with over 600 species of organisms living in these extreme conditions [6][10] - The cold seep ecosystem is crucial for understanding climate change, energy resources, and the origins of life, as it acts as a natural carbon sink by consuming methane [16][18] Group 2 - The cold seep research facility, with a total investment of 2.66 billion yuan, is set to be completed by 2030 and will allow for in-situ experiments at depths of up to 2000 meters [8][10] - The facility will consist of a surface support ship, an underwater laboratory, and a land-based simulation chamber, enabling scientists to conduct long-term studies in the cold seep environment [12][15] - The underwater laboratory will support six researchers for 30 days, equipped with advanced life support systems and emergency escape protocols [15][19] Group 3 - Cold seeps are rich in methane, a potent greenhouse gas, and the research aims to monitor methane release patterns to address climate change challenges [16][22] - The South China Sea is identified as one of the four major hydrate-rich regions globally, with an estimated resource potential of 74.4 billion tons of oil equivalent [18][22] - The unique microbial communities in cold seeps may provide new resources for pharmaceuticals, with 20%-30% of strains showing potential antibacterial and antiviral properties [18][22]

Core Insights - The article discusses the exploration of deep-sea cold seeps, referred to as "deep-sea oases," which thrive without sunlight and host unique ecosystems [3][4][10] - China is constructing the world's first 2000-meter deep manned laboratory to study these ecosystems, aiming to unlock secrets related to climate change, energy, and the origins of life [5][10] Group 1: Cold Seep Ecosystem - Cold seeps are not truly "cold," with temperatures around 2°C to 4°C, and are characterized by the release of methane and hydrogen sulfide from natural gas hydrates [4][10] - The ecosystem relies on chemosynthetic microorganisms that convert methane into energy, supporting over 600 species, including tube worms and mussels, forming a "black food chain" [4][10] - Cold seep organisms grow slowly, with some tube worms living over 200 years, highlighting their significance as "deep-sea living fossils" [4][10] Group 2: Research Facility - The "Cold Seep Ecosystem Research Facility," led by the South China Sea Institute of Oceanology, has a total investment of 2.66 billion yuan and is expected to be completed by 2030 [5][6] - This facility will support six researchers for 30 days, allowing for in-situ experiments on methane leakage and biological gene sequencing [5][6] - The facility consists of a surface support ship, an underwater laboratory, and a fidelity simulation chamber, designed to operate under extreme conditions [5][6] Group 3: Importance of Research - The cold seep ecosystem is crucial for understanding climate dynamics, as methane leakage from these areas accounts for 10% of global carbon emissions, while 90% is consumed by microorganisms [10] - The South China Sea is one of the four major regions for gas hydrates, with an estimated resource of 74.4 billion tons of oil equivalent [10] - Research in cold seeps may provide insights into the origins of life on Earth and potential extraterrestrial life, as well as new biotechnological resources for pharmaceuticals [10] Group 4: Recent Discoveries - China has identified seven cold seep areas, with significant discoveries made by the "Haimen" submersible in the South China Sea, including two active cold seep vents [11] - These vents are located at a depth of 1500 meters and cover an area of over 40,000 square meters, supporting diverse marine life [11]

证券研究报告 2025 年 4 月 29 日 星期二 【A 股市场大势研判】 市场全天震荡调整，三大指数小幅下跌 市场表现： | 指数名称 | 收盘点位 | 涨跌幅 | 涨跌 | 上证指数分时图 | | --- | --- | --- | --- | --- | | 上证指数 | 3288.41 | -0.20% | -6.65 | | | 深证成指 | 9855.20 | -0.62% | -61.86 | | | 沪深 300 | 3781.62 | -0.14% | -5.37 | | | 创业板 | 1934.46 | -0.65% | -12.73 | | | 科创 50 | 1002.83 | -0.17% | -1.74 | | | 北证 50 | 1277.03 | -1.78% | -23.16 | | 资料来源：东莞证券研究所，iFinD 数据 板块排名： | 申万行业表现前五 | | | 申万行业表现后五 | 概 | 念板块表现前五 | 概念板块表现后五 | | | --- | --- | --- | --- | --- | --- | --- | --- | | 银行 | 0.98% ...

Market Performance - The Xiaohongshu concept stock increased by 0.08%, ranking 9th among concept sectors, with 23 stocks rising, including Tianyu Shuke, Lionhead Co., and ST United, which hit the daily limit [1] - The top gainers in the Xiaohongshu concept include Kewah Data, Qingmu Technology, and Wajinke, with increases of 7.53%, 5.99%, and 3.97% respectively [1] - The biggest losers in the sector were Zhongguang Tianze, Yidian Tianxia, and Jinhe Shangguan, with declines of 9.07%, 4.77%, and 3.90% respectively [1] Capital Flow - The Xiaohongshu concept saw a net inflow of 161 million yuan from main funds, with 23 stocks receiving net inflows, and 12 stocks exceeding 10 million yuan in net inflow [1] - Tianyu Shuke led the net inflow with 170 million yuan, followed by Meiri Hudong, Huibo Yuntong, and Kewah Data, with net inflows of 55.78 million yuan, 45.26 million yuan, and 33.34 million yuan respectively [1] - In terms of capital inflow ratios, Lionhead Co., Xuanya International, and Yakang Co. had the highest ratios at 25.56%, 8.99%, and 8.29% respectively [2] Stock Performance - Tianyu Shuke had a daily increase of 10.07% with a turnover rate of 20.42% and a main fund flow of 170.19 million yuan [2] - Other notable performers included Meiri Hudong with a 3.85% increase and a turnover rate of 26.68%, and Huibo Yuntong with a 2.40% increase and a turnover rate of 10.35% [2] - The overall market saw various stocks with significant declines, including Zhongguang Tianze with a drop of 9.07% and a main fund outflow of 39.03 million yuan [5]

Market Performance - The Tianjin Free Trade Zone concept index declined by 3.22%, ranking among the top declines in concept sectors as of April 28 [1] - Within the sector, Tianbao Infrastructure hit the daily limit down, while other notable decliners included Jintou City Development and Tianjin Printers [1] - Only two stocks within the sector saw price increases, with Youfa Group rising by 2.78% and Tianjin Port by 0.22% [1] Capital Flow - The Tianjin Free Trade Zone concept experienced a net outflow of 78 million yuan from main funds, with nine stocks seeing net outflows [1] - The stock with the highest net outflow was Bohai Chemical, with a net outflow of 17.03 million yuan, followed by Ruipu Biology and HNA Technology with outflows of 16.13 million yuan and 14.13 million yuan respectively [1] - Conversely, the stocks with the highest net inflows included Guifaxiang, Jiuan Medical, and Youfa Group, with inflows of 3.25 million yuan, 2.40 million yuan, and 1.13 million yuan respectively [1][2] Stock Performance - The top decliners in the Tianjin Free Trade Zone concept included Bohai Chemical (-4.82%), Ruipu Biology (-1.30%), and HNA Technology (-3.73%) [1] - Notable gainers included Youfa Group (+2.78%) and Tianjin Port (+0.22%) [1] - The trading volume for Bohai Chemical was 6.29%, indicating significant trading activity despite the decline [1]

Group 1 - The fruit index concept rose by 1.62%, ranking 9th among concept sectors, with 18 stocks increasing in value, led by Xinyi Technology, Lante Optics, and Lens Technology, which rose by 6.73%, 4.82%, and 4.41% respectively [1][2] - The fruit index concept saw a net inflow of 773 million yuan from main funds, with 14 stocks receiving net inflows, and 6 stocks exceeding 50 million yuan in net inflow, with Lens Technology leading at 247 million yuan [2][3] - The top net inflow ratios were recorded for Lens Technology, Xinyi Technology, and Lingyi Technology, with net inflow rates of 15.12%, 12.74%, and 9.75% respectively [3][4] Group 2 - The fruit index concept's performance was contrasted with other sectors, such as the 6G concept which rose by 3.18%, while the South Korea-China Free Trade Zone fell by 3.88% [2] - The trading volume and turnover rates for leading stocks in the fruit index concept were highlighted, with Lens Technology showing a turnover rate of 1.68% and a trading volume of 246.58 million yuan [3][4] - The overall market sentiment reflected a mixed performance across various sectors, with some experiencing significant declines, such as the dairy sector which fell by 3.69% [2]

Core Viewpoint - The PVDF concept sector has shown a significant increase of 1.84%, leading the market in terms of growth, with notable stocks such as Heimao Co., Jinming Precision Machinery, and Sanmei Co. experiencing substantial gains [1][2]. Market Performance - The PVDF concept sector ranked first in today's market performance, with 12 stocks rising, including Heimao Co. (+6.83%), Jinming Precision Machinery (+5.82%), and Sanmei Co. (+3.09%) [1][2]. - Other notable sectors included Noise Control (+1.57%) and Camping Economy (+1.54%), while sectors like Combustible Ice and Controlled Nuclear Fusion saw declines of -1.62% and -1.15%, respectively [2]. Capital Flow - The PVDF concept sector attracted a net inflow of 144 million yuan, with eight stocks receiving significant capital inflows. Heimao Co. led with a net inflow of approximately 52.89 million yuan [2][3]. - Other companies with notable net inflows included Juhua Co. (48.30 million yuan), Jinming Precision Machinery (22.38 million yuan), and Putailai (11.17 million yuan) [2][3]. Capital Inflow Ratios - Heimao Co., Jinming Precision Machinery, and Juhua Co. had the highest net inflow ratios at 11.43%, 10.01%, and 7.81%, respectively [3]. - The detailed capital inflow data for the top stocks in the PVDF concept sector indicates varying performance, with Heimao Co. showing a daily increase of 6.83% and a turnover rate of 5.21% [3].