The tomb group covers an area of 500 meters from east to west and 400 meters from south to north.

The excavated tomb belongs to Princess Xiaozhen, the forth daughter of King III of the Bohai Kingdom. The tomb was built at the end of the eighth century with a brick tower, which was later destroyed; only the coffin chamber remains today. The most valuable treasures of the tomb are the 12 figures painted on the wall -- the first-discovered mural of the Bohai Kingdom. The east and west walls of the passageway display warriors, and in the square chamber are four painted servants on the left and right walls, with two servants on the back wall. The warriors are depicted in armor, scarves and elegant gowns. All of the subjects in the colored paintings have rotund figures, which reflected the character of the early Tang Dynasty (618-907) and the great influence of the advanced cultural art of the Central Plains area, to the ethnic groups in the border area. The walls of the chamber are made of brick. The inscription on the memorial tablet in the tomb was written in the regular script, recording Princess Xiaozhen's life story.