Photo taken on Oct. 16, 2021 with a mobile phone shows the view of a road linking Linzhou County and Lhasa City in southwest China`s Tibet Autonomous Region. The road network in Tibet has stretched over 118,800 km as of the end of 2020. (Xinhua/Shen Hongbing)

Photo taken on Dec. 19, 2021 with a mobile phone shows the view of a road in southwest China`s Tibet Autonomous Region. The road network in Tibet has stretched over 118,800 km as of the end of 2020. (Xinhua/Shen Hongbing)

Photo taken on Dec. 20, 2021 with a mobile phone shows the view of Galongla Tunnel in Medog County, Nyingchi City, southwest China`s Tibet Autonomous Region. The road network in Tibet has stretched over 118,800 km as of the end of 2020. (Xinhua/Shen Hongbing)

Photo taken on May 14, 2021 with a mobile phone shows the view of a road to Gyirong County, southwest China`s Tibet Autonomous Region. The road network in Tibet has stretched over 118,800 km as of the end of 2020. (Xinhua/Shen Hongbing)

Photo taken on Oct. 31, 2020 with a mobile phone shows the view of a road in Yangbajain, Lhasa, southwest China`s Tibet Autonomous Region. The road network in Tibet has stretched over 118,800 km as of the end of 2020. (Xinhua/Shen Hongbing)

Photo taken on Jan. 13, 2021 with a mobile phone shows the view of the Tanggula section of Qinghai-Tibet road in southwest China`s Tibet Autonomous Region. The road network in Tibet has stretched over 118,800 km as of the end of 2020. (Xinhua/Shen Hongbing)

Photo taken on Nov. 7, 2021 with a mobile phone shows the view of a road in Nagarze County, southwest China`s Tibet Autonomous Region. The road network in Tibet has stretched over 118,800 km as of the end of 2020. (Xinhua/Shen Hongbing)

Photo taken on Aug. 1, 2021 with a mobile phone shows bike enthusiasts riding on a road in southwest China`s Tibet Autonomous Region. The road network in Tibet has stretched over 118,800 km as of the end of 2020. (Xinhua/Shen Hongbing)