A jade seal with Liu's surname inscribed. [Photo by Guo Jing/China Daily]

Archaeologists scouring the area found a jade seal with Liu's surname, according to Xin Lixiang, an expert who is leading the team studying the coffin and its contents.

The graveyard, where the tomb was found, covers 40,000 square meters.

Approximately 10,000 cultural relics, including gold, bronze, and jade artifacts were unearthed in the area. Of these, more than 6,000 were found in the coffin chamber.