Underground cave dwelling courtyards covered in snow in N China's Shanxi

An underground cave dwelling courtyard is covered by snow in Zhangdian Town of Pinglu County, north China's Shanxi Province, Jan. 5, 2018. As an ancient and unique kind of architecture, these yards are also called "pit yards" by locals. Recent days the south-central area of Shanxi Province was hit by heavy snow. (Xinhua/Zhan Yan)