Photo taken on March 22, 2018 shows the construction site of Thailand-China High Speed Train project in Pak Chong, Thailand. Construction of the first section of Thailand-China High Speed Train project has been running smoothly, or 7 percent completed, Thanin Somboon, Director-General of Thailand's Department of Highways said on Thursday at the construction site here. (Xinhua/Rachen Sageamsak)