Ancient Tombs at Longtou Mountain

The Ancient Tombs at Longtou Mountain are a collection of 12 burials for royalty of the Bohai Kingdom. It is located on the Longtou Mountain, southeast Toudao Township , Helong County , Yanbian Korean Autonomous Prefecture, Jilin. The most famous of the burials is the Mausoleum of Princess Zhenxiao.

The Burials were made the a unit of the third series of Protected National Cultural Artifacts by the State Council on January 13, 1988. The area was possibly called "the Western Field of the Ran Valley" by the Bohai people, as a Bohai document indicated that is the place where Princess Zhenxiao was buried.

The burial cover an area with the diamters east-west 500 metres, north-south 400 metres. After being made a Cultural Artifacts unit, the protected area expanded to the west 0.5 kilometre to Fudong River , west 5 km, north 5 km.

There are three burial zones:

Dragon Lake
Dragon Sea
Stone Kingdom
The walls, especially the murals, have been covered with anti-corrosive chemicals. There are also protective personnel on site, so administrative offices were constructed near the Mausoleum of Princess Zhenxiao.