Constructors use a large tamping machine to maintain the newly-laid tracks in Nanchang City, east China's Jiangxi Province, July 19, 2019. With over 1,000 constructors' continuous eight hours of striving, the Nanchang-Ganzhou high-speed railway has successfully connected to Nanchang transportation hub on Friday, which means it has formally joined China's high-speed rail network. The 415.734-kilometer-long Nanchang-Ganzhou high-speed railway designed with a speed of 350 km per hour links Nanchang City and Ganzhou City of Jiangxi Province. (Xinhua/Du Huaju)