Requested by @Leiaaax 

Chinese Ghost are popular in Chinese culture, with people believing that they can contact dead relatives via a medium. There are many variants of Chinese ghosts , but Leiaaax requested the yāoguǐ, a type of ghost that can transform into any physical object.  The yāoguǐ are trying to  achieve immortally, some of their means of doing this are more dangerous than others. Most are peaceful, leaching off animals, while some try to leach off humans, going after Holy Men the most, as their Qi (Life Energy)is purer than most people. Some leach of humans so much they turn into demons. Their appearance changes, but most have a gaping mouth to leach off near sources of Qi .