The level of cultivation in this article: Forging the body → Practicing Qi → Bigu → Fusion → Building the foundation → Golden elixir → Nascent Soul → Leaving the body → Overcoming the tribulation → Dacheng → Ascension
Demon Realm: Demon Feeder (a low-level demon who has no spiritual wisdom and only knows how to kill) → Demon Servant (a demon who has spiritual wisdom but cannot practice) → Demon Soldier (a demon who has spiritual wisdom and a little cultivation) → Demon General → (with higher cultivation than the Demon Soldier) → Demon King → Demon Lord → Demon Lord → Demon Ancestor (the highest-level demon, there is only one, and he is still asleep_(:з∠)_)