Tourists visit the Chatan Weir ancient irrigation system in Taihe County of Ji'an, east China's Jiangxi Province, May 29, 2018. The Chatan Weir irrigation system has a history of over 1,000 years. While still serving nearby crop fields, the irrigation project was listed as a Heritage Irrigation Structure by the International Commission on Irrigation and Drainage in 2016. (Xinhua/Peng Zhaozhi)