File photo taken on June 5, 2020 shows a stone tablet unearthed from the remains of the Qingpingbao castle, located in Jingbian County, Yulin City of northwest China's Shaanxi Province. The remains of a Great Wall castle dating back to the Ming Dynasty (1368-1644) were discovered in northwest China's Shaanxi Province, said the Shaanxi Academy of Archaeology Tuesday. Architectural relics, including two courtyards, were found at the remains of the Qingpingbao castle. (Xinhua)
