(221001) -- LHASA, Oct. 1, 2022 (Xinhua) -- Workers work at the construction site of the Laohuzui tunnel on the highway linking Pad Township in the city of Nyingchi and Medog County, southwest China's Tibet Autonomous Region, Feb. 9, 2021. The 67.22-km road connects Pad Township in the city of Nyingchi and Medog County. It is the second passageway to Medog, following the first one connecting the county and Zhamog Township, Bomi County. After the new highway opens to traffic, the length of the road connecting the city proper of Nyingchi and Medog County will be shortened to 180 km from 346 km, cutting travel time to four hours. (Photo by Dong Zhixiong/Xinhua)