The Burials were made the a unit of the third series of Protected National Cultural Artifacts (重点文物保护单位) by the State Council on January 13, 1988. The area was possibly called "the Western Field of the Ran Valley" (染谷之西原) 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 (福洞河), west 5 km, north 5 km.
There are three burial zones:
Dragon Lake (龍湖)
Dragon Sea (龍海)
Stone Kingdom (石國)
The walls, especially the murals, have been covered with anti-corrosivechemicals. There are also protective personnel on site, so administrative offices were constructed near the Mausoleum of Princess Zhenxiao.
In ancient times Jilin was inhabited by various peoples, including the Mohe and the Wuji.
Jilin is drained by the Yalu and Tumen Rivers in the extreme southwest (which together form the border between China and North Korea), by tributaries of the Liao River along the southern border, and by the Songhua and Nen rivers, both eventually flowing into the Amur.
The Changbai Mountains, especially Lake Tianchi on the border with North Korea, are popular tourist destinations due to their natural scenery.