The biggest obstacles to advancing the China–North Korea–South Korea high-speed rail project stem primarily from geopolitical tensions, infrastructure incompatibilities, and funding coordination challenges. First, the prolonged instability on the Korean Peninsula—driven by historical animosities and a lack of mutual security trust between North and South Korea—makes sustained cross-border railway cooperation difficult. Second, the three countries use different rail standards: both China and South Korea employ standard gauge (1,435 mm), while North Korea still relies heavily on narrow gauge (1,067 mm) tracks and outdated equipment, resulting in poor technical compatibility and high retrofitting costs. Additionally, the project requires massive investment, yet North Korea’s closed economy and limited access to international financing—further constrained by sanctions—hinder its ability to contribute financially. Although China and South Korea have repeatedly expressed interest in cooperation, and limited railway connectivity tests resumed after the 2018 inter-Korean summit, meaningful progress remains stalled due to insufficient political trust and regional security uncertainties. Unless significant breakthroughs occur in denuclearization and peace-building on the peninsula, a fully operational trilateral high-speed rail link is unlikely in the near term.
推进中朝韩高铁项目的最大障碍主要来自地缘政治、基础设施差异与资金协调三方面。首先，朝鲜半岛局势长期紧张，朝韩关系受制于历史矛盾与安全互信缺失，使得跨境铁路合作难以稳定推进。其次，三国铁路系统标准不一：中国采用标准轨（1435毫米），韩国亦同，但朝鲜仍大量使用窄轨（1067毫米）及老旧设备，技术兼容性差，改造成本高昂。此外，项目涉及巨额投资，而朝鲜经济封闭、融资能力有限，国际制裁也限制了外部资本参与。尽管中、韩曾多次表达合作意愿，并在2018年朝韩首脑会晤后重启部分铁路连接测试，但实质性进展仍受制于政治互信不足与区域安全格局的不确定性。因此，除非半岛无核化与和平机制取得突破，否则中朝韩高铁短期内难以实现贯通运营。
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