The inside of an unearthed coffin is pictured after archaeologists open it at Xilin Gol league museum in Xilin Hot, North China’s Inner Mongolia autonomous region, March 8, 2014.

The inside of an unearthed coffin is pictured after archaeologists open it at Xilin Gol league museum in Xilinhot, north China’s Inner Mongolia Autonomous Region, March 8, 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 by Zhang Ling/Xinhua]

Archaeologists measure unearthed articles at Xilin Gol league museum in Xilinhot, 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 by Zhang Ling/Xinhua]

Archaeologists lift the cover of an unearthed coffin at Xilin Gol league museum in Xilinhot, north China’s Inner Mongolia Autonomous Region, March 8, 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 by Zhang Ling/Xinhua]