Yaks pass through a culvert beneath the Qinghai-Xizang Railway in Seni district of Nagchu, Southwest China's Xizang autonomous region, June 18, 2026. [Photo/Xinhua]
As the Qinghai-Xizang Railway stretches across the northern Tibetan Plateau, it has built not only dedicated wildlife crossings, but also many culverts and bridges to serve as ecological corridors for livestock such as cattle and sheep.