A turtle shaped earthen rice steamer of Hongshan culture period is exhibited at Yuanhao Huazang Museum in Xi'an, capital of Northwest China's Shaanxi province, on Dec 9, 2014. Hongshan culture was a Neolithic era in Northeastern China, and Hongshan sites have been found in area stretching from Inner Mongolia to Liaoning, dating from about 4700 to 2900 BC. [Photo/Xinhua]