Tips:

The 5th floor of Qin-Shi Tomb is called Fire Spirits. "Home of the Four Guardians and ShinMoo the Man of the Flames, images related to flame are scattered throughout the dungeon."

The mobs' level ranged from 98 to 100. 5 uniques spawn in this area, respectively in the North, West, South, East and Center.

ShimMoo The man of Flames only spawn after other 4 uniques are killed. And after you kill him, the gate to 6th floor will appear in the center. Then just go inside and kill the final bosses in Qin-Shi Tomb.