Pan Jinlian, Lu Bu, Zhu Bajie, Li Kui, Wang Xifeng, Zhou Yu...
They become spirits because of their thoughts, their reincarnations are endless, and their resentment cannot be extinguished.
Resentments require sacrifices from the mortal world to worship and reconcile.
"Living in people's hearts" is not rhetoric but the cruel truth of another world.
They never left.
You can't see it just because you don't know the definition of "seeing".
Intention: You and I both have a place to come from, but the return journey is unknown.