Friendship tunnel
The 102nd longest tunnel in the world
The China–Laos Railway Friendship Tunnel (Chung-lao tʻieh-lu you-yi sui-tao, Lao) is a cross-border railway tunnel that connects China to Laos. The tunnel, which opened in 2021, spans a total length of 9.59 km—7.17 km lie within China, while the remaining 2.42 km extend into Laos. Its given name symbolizes the deep friendship between the two countries' peoples.
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).