In 2017 a team of archaeologists from Ulaanbaatar State University made some amazing finds in Ulziit sum of Arkhangai province in central Mongolia. This discovery was kept secret and only last summer publicized by in Mongolian media. They discovered and excavated Dragon City or Longcheng City, capital of the Xiongnu Empire. They unearthed a fragment of a roof decoration and it was written with the phrase “Son of Heaven Shany”
The Xiongnu were a tribal confederation and inhabited the eastern Eurasian from the 3rd century BC to the late 1st century AD.