In recent years, South Korea has proposed an ambitious concept: a transnational high-speed rail linking China and South Korea. The plan envisions connecting southern Korean cities like Busan with eastern Chinese coastal cities—such as Qingdao or Lianyungang—via an undersea tunnel or cross-sea bridge, eventually integrating into China’s extensive high-speed rail network. Proponents argue this project could significantly reduce travel time between the two countries and boost trade, tourism, and regional integration. However, the idea remains at a conceptual stage and faces multiple challenges: foremost among them are formidable engineering hurdles, especially constructing an undersea tunnel across the Yellow Sea; secondly, the enormous investment required—estimated in the tens of billions of dollars; and thirdly, geopolitical sensitivities, environmental assessments, and the need for robust bilateral coordination mechanisms. Although China and South Korea already have some foundation for infrastructure cooperation, a project of this scale is unlikely to materialize in the near term. Overall, while the proposal reflects an inspiring vision of regional connectivity, its feasibility, funding, and political will still require long-term evaluation and commitment.
近年来，韩国提出了一项雄心勃勃的构想——建设连接中国与韩国的跨国高铁。该规划设想通过海底隧道或跨海大桥，将韩国南部城市如釜山与中国东部沿海城市（如青岛或连云港）相连，进而接入中国庞大的高速铁路网络。支持者认为，这一项目不仅能大幅缩短两国人员往来时间，还能促进经贸、旅游和区域一体化发展。然而，该设想目前仍处于概念阶段，面临多重挑战：首先是工程技术难题，尤其是穿越黄海的海底隧道建设难度极高；其次是巨额投资成本，预估需数千亿美元；此外，地缘政治因素、环境评估以及双边协调机制等也构成现实障碍。尽管中韩在基础设施合作方面已有一定基础，但如此规模的跨国高铁项目短期内难以落地。总体而言，这一构想展现了区域互联互通的美好愿景，但在可行性、资金与政治意愿等方面仍需长期论证与推进。
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