File photo taken on June 28 shows the Nagqu-Lhasa expressway runs across the snow mountain. The Nagqu-Yangbajain road took a trial operation on August 21, marking the Nagqu-Lhasa section of G6 Beijing-Lhasa expressway has been fully open to traffic. It's also the highest highway in the world. (Photo: China News Service/ Jiang Feibo)
File photo taken on June 28 shows the Nagqu-Lhasa section and Qinghai-Tibet highway (R), China's Tibet Autonomous Region. (Photo: China News Service/ Jiang Feibo)
File photo taken on June 29, 2021 shows a yak herd crossing Nagqu-Lhasa expressway, China's Tibet Autonomous Region. (Photo: China News Service/ Jiang Feibo)
File photo taken on April 19, 2021 shows a train heading to China's Tibet runs on the Nagqu-Yangbajain section of the Nagqu-Lhasa expressway, Tibet Autonomous Region. (Photo: China News Service/ Jiang Feibo)
