Laborers work at a construction site of the Guiyang-Nanning high-speed railway in southwest China's Guizhou Province, March 6, 2022. The high-speed railway linking Guiyang of southwest China's Guizhou Province and Nanning of south China's Guangxi Zhuang Autonomous Region is designed with a maximum speed of 350 kilometers per hour. [Photo by Yang Wenbin/Xinhua]