XI'AN, Dec. 4 (Xinhua) -- Multiple grain storage pits dating back more than 4,000 years were discovered in northwest China's Shaanxi Province, which offer fresh evidence for the study of early ...

This undated file photo shows an aerial view of central part of the Luojiahe cultural relic site in Chunhua County, Xianyang City, northwest China's Shaanxi province. [Photo/Xianyang Cultural Heritage ...