Seeing these garments that were very characteristic of the Aud Empire, Baiyue couldn't suppress her desire to document them. So, Luo'er had Hu Daoke accompany her to draw and record this information, while he himself led the others toward the main tomb chamber.
Most members of the Advance Team are staunch atheists, so they don't particularly believe in ghosts and spirits. Although the laws of the world in the Otherworld differ from those on Earth, they still do not believe in the concept of ghosts and spirits.
The case of Fulajie'er made it very clear: once a body is damaged, the soul will dissipate into the world. Therefore, even if the Otherworld has environments where ghosts can exist, they would also dissipate due to the death of bodily functions.
As for the souls of the living, that's no longer the concept of ghosts. Dead people don't have souls unless they become gods; this is the experience the Advance Team has gathered over their long adventures in the Otherworld.