An archaeologist checks an unearthed coffin at Xilin Gol league museum in Xilin Hot, North China's Inner Mongolia autonomous region, March 7, 2014. A 1,500-year-old coffin, excavated from grassland of Xilin Gol league, was opened here on March 8. The well-preserved coffin could date back to Northern Wei Dynasty (386-534). The identity of the tomb's owner is still unknown. [Photo/Xinhua]