Drainage pipe found at Handongcheng ruins in Yongchuang District, Southwest China’s Chongqing Municipality, Jan. 6, 2017. Over 1,200 ancient artifacts, including some made of porcelain, stone, bronze, and bone, have been found in the third excavation. The ruins over an area of 400,000 square meters date back to Song Dynasty (960-1279). (Photo: China News Service/Su Hong)
