https://uic.org/com/enews/687/article/china-china-laos-railway-construction-fully-resumes-of-international-corridor
China-Laos Railway (Vientiane–Boten Railway): Construction fully resumes of international corridor. A key tunnel on the China-Laos Railway (China section) was completed on 4-19-20 morning after three years and eight months of construction. The 4.6-km-long tunnel has a supersized cross-section, reserved space for an additional railway line in the future.
At present, construction has been resumed in all work sites of Yuxi-Mohan Railway, with 22,896 workers on duty, an increase of 21% over the number before the Spring Festival. On 15 February, the Lixin Tunnel was successfully created, and on 13 March, Wanhe Tunnel, the first 10,000-m long tunnel in the whole railway was successfully bored. The boring-through of Malizhai Tunnel on 15 March has played a positive role in promoting the full resumption of the whole railway’s normal construction. As of 25 March, the total investment for Yuxi-Mohan Railway had reached RMB 37.1 billion, and 93%, 80% and 86% of subgrade, bridge and tunnel works on the railway had been completed.