Aerial photo taken on June 16, 2019 shows a box girder installation site on new Taiyuan-Jiaozuo high-speed railway in Shangtun Village of Boai County in Jiaozuo, central China's Henan Province. The first box girder in the Henan section of the railway was installed here Sunday, marking an important progress in the construction of the new high-speed railway linking Taiyuan, north China's Shanxi Province, and Jiaozuo in Henan. The 362-km railway line is expected to start service in 2020 with a designed speed of 250 kilometers per hour. (Xinhua/Li An)