研究还显示，中美之间的科研合作大约从2019年起止步不前，甚至开始下滑，而这种合作长期以来是美 国整体论文引用影响力的重要组成部分。研究指出，这一趋势既与中国近年来重视提升本国科研能力有 关，也与美国政府此前打击所谓"学术间谍"的活动有关。与此同时，中国与欧洲的科研合作持续增长。 科睿唯安报告指出，中美科研合作减少实际上对美国不利。美国俄亥俄州立大学政策专家瓦格纳认为， 更危险的是，如果以"国家安全"和经济竞争力为名设置障碍，全球科学事业本身将会遭受损失。她 说："我们正走出一个近似'黄金时代'的时期——人们可以非常自由地跨越政治开展合作。这种情况正 在发生改变。"亚当斯表示，最新研究数据清晰表明，科学研究的影响力越来越依赖于全球参与和合 作，"如果你不在这个国际科研网络之中，就无法从事真正具有重大意义的研究。" "在国内，中国科研产出在过去十年中增长了一倍以上：2020年，中国已超越美国，成为全球科研论文 产出最多的国家，目前也有望在论文被引用次数上取得领先地位。"研究报告写道。 这项研究还显示，美国发表的论文数量和质量都止步不前，其科研产出尚未从疫情期间的下滑态势中恢 复。研究同时提到，美国科研的困境在疫 ...

Core Insights - China's scientific research influence is rapidly increasing, reshaping the global scientific landscape, as highlighted by the analysis from Clarivate Analytics based on 25 years of citation data from the Web of Science database [1] - The United States is experiencing a gradual decline in its traditional position as a research powerhouse and collaboration center due to various policies that have negatively impacted its research environment [1] - Over the past decade, China's domestic research output has doubled, making it the largest producer of academic papers globally by 2020, with expectations to lead in citation metrics as well [1] Group 1 - The collaboration between China and Europe in scientific research is strengthening, while the collaboration between China and the U.S. has slowed down since 2019 due to restrictions on academic exchanges and China's focus on enhancing its own research capabilities [2] - The overall global research collaboration is on the rise, with high-impact research increasingly stemming from multilateral cooperation [1][2] - The decline in U.S. research output and citation influence has been ongoing for several years, exacerbated by the pandemic, with a notable decrease in citation impact observed since 2018 [1] Group 2 - Experts suggest that the global research collaboration network is undergoing a restructuring, influenced by the adjustments in U.S.-China relations, with China aiming to build a multipolar scientific system while enhancing its domestic capabilities [2] - The shift in the dynamics of international scientific collaboration may hinder the open exchange of information, particularly if the U.S. imposes further restrictions under the guise of national security and economic competitiveness [2]

Core Insights - The article highlights the significant growth of Chinese researchers' publications in Cell Press journals over the past decade, showcasing advancements in originality, systematic approaches, and openness in Chinese scientific research [2][48]. - In 2024, the total number of research papers published by Chinese institutions in Cell Press journals reached a record high of 2,446, marking a 17.6% increase from the previous year and nearly quadrupling the output from 2020 [3][14]. Publication Growth - The number of papers published in the life sciences field by Chinese scholars was the highest in 2024, totaling 860 papers, with the medical field showing the most notable growth, increasing by 138 papers [6]. - The journal Cell Reports Medicine saw the number of Chinese papers surpass 100 for the first time, while materials science and interdisciplinary fields also experienced steady growth, reaching 554 and 394 papers, respectively [6]. Journal Performance - In 2024, 18 hybrid journals under Cell Press reported growth in the number of Chinese publications, with Joule and Device in materials science showing the highest increases of 32 and 31 papers, respectively [7]. - The medical journal Med saw a remarkable increase, with a total of 32 papers published, reflecting a 2.5-fold increase from the previous year [7]. Open Access Trends - The proportion of papers published in open access (OA) format by Chinese scientists in Cell Press journals approached three-quarters of all Chinese publications, totaling 1,761 papers, which is a 13% increase from the previous year [10]. - The number of OA papers published in hybrid journals rose from 69 to 119, marking a 72.5% increase, indicating a growing commitment to open access among Chinese researchers [11]. Annual Paper Awards - The 2024 Cell Press Annual Paper Awards recognized 50 outstanding papers across five fields, with an additional 25 papers voted as the most popular by the public [14]. Research Institution Landscape - In 2024, the number of Chinese institutions publishing in Cell Press journals exceeded 300 for the first time, with a notable increase of 40 institutions from the previous year [32]. - Sun Yat-sen University led in publication volume with 113 papers, followed by Shanghai Jiao Tong University and Zhejiang University with 106 and 105 papers, respectively [32]. Regional and International Collaboration - Beijing remained the leading region for publications with 442 papers, followed by Guangdong and Shanghai [38]. - The number of countries and regions collaborating with Chinese scholars reached 76, reflecting a 20.6% increase, with the United States being the most frequent collaborator [43][47].

Core Insights - The 2024 Nature Index highlights that Chinese cities now occupy more than half of the top ten global research cities, increasing from five to six cities compared to 2023 [1][2] - Beijing retains its position as the top research city globally since 2016, followed by Shanghai, with Nanjing, Guangzhou, Wuhan, and Hangzhou also making the list [1][2] Summary by Categories Research City Rankings - In 2024, the top ten research cities include six from China: Beijing, Shanghai, Nanjing, Guangzhou, Wuhan, and Hangzhou, alongside New York, Boston, San Francisco, and Baltimore-Washington [1][2] - Guangzhou improved its ranking from eighth to sixth, surpassing the San Francisco Bay Area, while Wuhan and Hangzhou also saw upward movements [2] Research Output Growth - Beijing's research output increased by over 9% from 2023 to 2024, while Shanghai's output grew nearly 20% [2] - The report indicates significant improvements in research performance among Chinese cities, particularly in chemistry, physical sciences, and earth and environmental sciences [2] Subject Area Performance - Chinese cities dominate the rankings in chemistry, physical sciences, and earth and environmental sciences, with Beijing leading in all three fields [2] - In biological sciences, New York and Boston rank first and second, with Beijing in third place, while in health sciences, which was newly included in the index, Beijing ranks sixth [2] Challenges and Global Collaboration - The report also addresses the issue of land subsidence faced by rapidly expanding coastal megacities, particularly in the context of rising sea levels [3] - It emphasizes the potential for innovative solutions to challenges like land subsidence through global research collaboration [5]