A major milestone was reached on August 17, 2026 on the Gaoligong Mountain Tunnel, a critical section of the China-Myanmar international railway corridor. The parallel pilot tunnel between the tunnel portal and Shaft No. 1 was successfully connected, pushing overall progress beyond 70%.
2026年8月17日，中缅国际铁路通道关键工程——高黎贡山隧道建设取得重大进展：隧道进口至1号竖井平行导洞顺利贯通，全隧总体进度突破七成。
The Gaoligong Mountain Tunnel is 34.5 km long, making it China's first extra-long railway tunnel crossing the Hengduan Mountains. The construction area traverses 17 geological strata and 19 fault zones, and Shaft No. 1, at 765 meters deep, is the deepest railway shaft ever built in China. The breakthrough enables three-dimensional construction, adding four new working faces on the main tunnel.
高黎贡山隧道全长34.5公里，是我国首条穿越横断山脉的特长铁路隧道。施工区域涵盖17种地层、19条断裂带，1号竖井深达765米，为国内最深铁路竖井。此次贯通实现立体化施工，新增4个正洞作业面。
The tunnel is part of the Dali-Ruili Railway, a 330 km line within the China-Myanmar international corridor. Once completed, travel time between Dali and Ruili will be cut from about 6 hours to 3 hours, and Dehong Prefecture will end its history of having no railway connection. The railway is expected to become a key land link connecting southwest China with Myanmar and onward to the Indian Ocean region, supporting regional trade and the Belt and Road Initiative's China-Indochina and China-Myanmar economic corridors.
该隧道属于中缅国际铁路通道的组成部分——大瑞铁路（全长330公里）。建成后，大理至瑞丽的行车时间将由约6小时缩短至3小时，德宏州将结束不通铁路的历史。这条铁路有望成为连接中国西南与缅甸、进而延伸至印度洋地区的关键陆路通道，支撑区域贸易以及"一带一路"中缅经济走廊建设。
The breakthrough comes as China accelerates construction of international rail corridors across Southeast Asia, following the operational success of the China-Laos Railway, which by August 10, 2026 had moved over RMB 94 billion in cumulative cross-border cargo value since opening in 2021. Industry analysts note that the China-Myanmar corridor faces significant engineering challenges — including complex geology and financing coordination — but steady progress on the tunnel signals continued commitment to long-horizon infrastructure cooperation.
此次突破正值中国加速东南亚国际铁路通道建设之际。此前通车的中老铁路截至2026年8月10日累计跨境货物货值已超940亿元。业内人士指出，中缅通道面临复杂地质、融资协调等重大工程挑战，但隧道的稳步推进表明各方对长周期基建合作持续投入。
For enterprises and investors tracking Belt and Road infrastructure, the Gaoligong Mountain milestone offers two takeaways: first, flagship tunnel projects signal bankable progress on corridor-level connectivity; second, the engineering complexity underscores the importance of geological risk assessment and phased construction planning in cross-border railway investment.
对于关注"一带一路"基建的企业与投资者，高黎贡山隧道进展有两点启示：其一，标志性隧道项目表明走廊级互联互通正在取得可验证的实质进展；其二，工程复杂性凸显跨境铁路投资中地质风险评估与分期施工规划的重要性。
（来源：中国一带一路网 / 新华社）
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