Whose tomb is Longshou Mountain in Liaoyuan?

Royal Cemetery of Bohai Kingdom in Tang Dynasty in China (698 ~ 926).

Longtoushan Ancient Tombs: Royal Tombs of Bohai Kingdom (698 ~ 926) in Tang Dynasty in China. Located at the east slope of Longtou Mountain, northwest of Longhai Village, Helong County, Jilin Province 1.5km. 1980, the tomb of Princess Zhenxiao was discovered and excavated. 1988 People's Republic of China (PRC) * * * and the State Council were announced as national key cultural relics protection units. The tomb is about 200 meters long and 100 meters wide, and there are 10 ancient tombs identified.

Related information:

The tomb tower is built directly above the tomb, and the brick tower foundation is nearly square, with a length of 5.65 meters from north to south and a width of 5.50 meters from east to west. The center is a square hollow tower, 2.7 meters long from north to south and 2.6 meters wide from east to west. The first half was destroyed years ago. The tomb wall is painted with white ash and painted with murals. At the back of the tunnel, a warrior in a pocket and armor is painted on the walls on both sides.

There are 10 attendants and musicians painted on the east, west and north walls of the tomb, wearing hoes or trowels, round neck robes, belts, boots or Ma Xie, and holding musical instruments. Characters are drawn with thin lines, dyed with vermilion, red, ochre, cyan, green and white, and finally shaped with ink lines. The brushwork is meticulous, the images are rich, and the style comes down in one continuous line with the prosperous Tang Dynasty.