A section of a railway in Wuning, South China's Guangxi Zhuang Autonomous Region, part of the Guinan high-speed railway, is seen on December 23, 2021. Work has finished on the 38 tunnels under the 482-kilometer railway project, connecting Guiyang in Southwest China's Guizhou Province and Nanning in Guangxi. The railway is expected to start operating in 2023. Photo: cnsphoto