As for ghosts, they are the spirits that have mutated under special circumstances.
Then for various reasons, they could not go to the Underworld.
Generally, the spirits lingering in the mortal world, if they don't learn the way of cultivation, they won't last long because they don't have the nourishment of the Qi from the Netherworld.
As for the ghosts that can linger in the mortal world, they more or less know some methods of cultivation, by practicing through the Yin Qi, so they will not perish.
All the demons here have cultivation within them, with their vital energy thriving, ordinary little ghosts would not dare to bother them.
This is why they have never seen ghosts or spirits.
Fear of the unknown is common not only in humans but also in demons, it's a common sentiment among sentient beings.
Lu Wufei had just opened the stopper of the Soul Raising Calabash.
A voice quickly came out from inside.
"Oh my, I was suffocating in there..."
