Why Do All These Monsters Have Health Bars?

'''Li Jing has crossed over, arriving in a modern world where everyone cultivates immortality. Here, everything relies on the spiritual energy gained through one's own cultivation. With no family or friends, no money in his pocket, and no knowledge of how to cultivate, life is a constant struggle. That is, until Li Jing walks into a spirit chicken shop and discovers he can see the health bars above the spirit chickens... (This story is set in a completely fictional universe; please do not draw real-life parallels.)'''