Realm system: Human Realm (Qi training → Foundation building → Dan formation → Nascent Soul → Incarnation → Fusion → Mahayana → Overcoming Tribulation) → Ascension → Immortal Realm (Human Immortal → Earth Immortal → Heavenly Immortal → Golden Immortal → Taiyi Golden Immortal → Daluo Golden Immortal → Quasi-Sage → Saint) → Imperial Realm (Great Emperor → Heavenly Dao Realm → Great Dao Realm)
World view:
The original world (modern city): There is an underworld, the spiritual energy is thin, and it is affected by the prehistoric world.
The prehistoric world: the ancient holy land of cultivation, which was once connected to the original world through the "Heaven and Earth Bridge", but was later separated due to crisis.
Different world: The "origin of the world" covets the ancient world and the original world, and sends an undercover agent from the Tiandao realm to lurk.
