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

Aerial photo taken on Jan. 5, 2018 shows the snow-covered underground cave dwelling courtyards in Zhangdian Town of Pinglu County, north China's Shanxi Province. 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)