Railway construction workers celebrate as they complete laying the tracks for the Hangzhou-Huangshan high-speed line in Hangzhou, East China’s Zhejiang province, March 12, 2018. [Photo/Xinhua]

In this aerial photo taken on March 12, 2018, railway construction workers lay the tracks for the Hangzhou-Huangshan high-speed line (below) in Hangzhou, East China’s Zhejiang province. The Hangzhou-Huangshan high-speed line is scheduled to open in 2018. [Photo/Xinhua]

A ceremony marking the completion of track-laying for the Hangzhou-Huangshan high-speed line is held in Hangzhou, East China’s Zhejiang province, March 12, 2018. [Photo/Xinhua]