Between Immortal Realms, there exists Domain Walls, cutting off the communication between realms.
However, Domain Walls have existed for a very long time, and many places develop gaps where one can "sneak across."
Using a more cumbersome method, first go to the Mortal Realm, then through the Inter-Realm Transport Array of another domain to travel to the corresponding Immortal Realm, accomplishing cross-domain travel just the same. Of course, this method requires the cooperation of the two domains.
Li Lin holds great significance for the Qinghuo Immortal Domain, having the potential to become an Immortal King.
For geniuses capable of achieving Immortal King status, there exist two completely different attitudes—either eliminate them or anticipate their growth, as an Immortal King is truly very important to a domain.
