YUNNAN PROVINCE, April 2026 — Tracklaying has officially begun on the 700km Chongqing-Kunming high-speed line, with rails being laid on slab track in Yunnan province. This phase of the project involves the installation of 846km of rail, 50 turnouts, and 16 expansion joints, following the completion of extensive civil engineering works.
The Yunnan section of the line traverses the challenging Wumeng Mountains in the Yunnan-Guizhou Plateau, an area known for its complex geological features. The alignment is predominantly composed of bridges and tunnels, accounting for 87.4% of its total length. Notably, the project includes ten tunnels exceeding 10km, with the Zhaotong Tunnel being the longest at 24.8km.
Concurrently with tracklaying, efforts are underway to finalize the interior decoration of the seven new stations being constructed along the high-speed line in Yunnan. These stations include Yanjin South, Yiliang North, Zhaotong East, Huize, Tianba, Xundian East, and Changshui Airport, preparing them for operational readiness.
This development underscores China's ongoing commitment to expanding its high-speed rail network, contributing to improved transportation efficiency and economic integration across its vast territory. The project's progression through complex terrain highlights advanced engineering capabilities in railway construction.
Source: International Railway Journal
Tracklaying Commences on Chongqing-Kunming High-Speed Rail Project in Yunnan Province
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China's extensive high-speed rail development continues with the commencement of tracklaying on the 700km Chongqing-Kunming line in Yunnan province. This milestone signifies significant progress in enhancing regional connectivity and advancing major infrastructure projects within the country.
