Passengers are served on the inaugural service of the newly opened Lhasa-Nyingchi Railway on Friday. [Photo/Xinhua]

A Fuxing bullet train runs on the Lhasa-Nyingchi railway during a trial operation in Southwest China`s Tibet autonomous region, June 8, 2021. [Photo/Xinhua]

Aerial photo taken on June 17, 2021 shows a Fuxing bullet train running on the Lhasa-Nyingchi railway during a trial operation. [Photo/Xinhua]

Passengers aboard the Fuxing bullet train are pictured in Southwest China`s Tibet autonomous region, June 25, 2021. [Photo/Xinhua]

Passengers aboard the Fuxing bullet train are pictured in Southwest China`s Tibet autonomous region, June 25, 2021. [Photo/Xinhua]

Aerial photo taken on June 16, 2021 shows a Fuxing bullet train running on the Lhasa-Nyingchi railway over the Yarlung Zangbo River during a trial operation. [Photo/Xinhua]

A passenger aboard the Fuxing bullet train takes photos of the scenery along the Lhasa-Nyingchi railway, June 25, 2021. [Photo/Xinhua]