A drone aerial photo captures the refreshing summer scenery over part of the highway linking Lhasa and Nyingchi in Southwest China's Tibet autonomous region, July 16, 2019. The highway, spanning over 400 kilometers, connects eastern and central Tibet. [Photo/Xinhua]

A picturesque and idyllic landscape along the highway linking Lhasa with Nyingchi in Tibet autonomous region, July 16, 2019. [Photo/Xinhua]

An aerial photo of qingke (highland barley) fields and blooming canola flowers along the highway linking Lhasa with Nyingchi in Tibet autonomous region, July 16, 2019. [Photo/Xinhua]

A picturesque landscape along the highway linking Lhasa with Nyingchi in Tibet autonomous region, July 16, 2019. [Photo/Xinhua]

A picturesque and idyllic landscape along the highway linking Lhasa with Nyingchi in Tibet autonomous region, July 16, 2019. [Photo/Xinhua]