Regardless of whether it's from the mundane world to the Cultivation Realm, or vice versa, one must travel via a massive teleportation array.
This teleportation array is located in a very secretive place, hence those cultivators who come here, settle and establish enterprises here.
Of course, the cultivators who come here are not sent by a Level three family like the Liu family, but by the kings and powerful clans of the Cultivation Realm.
They control the rules and vast resources of the Cultivation Realm, and everything is decided by the king and them.
Even so, being high up, the king rarely bothers with such trivial matters, so most of the decisions are made by the powerful clans.
Each clan sends a trusted follower here, so with over a hundred powerful clans, there are over a hundred cultivators.
They establish families and business in the mundane world, set up small clans, and even fervently collect fine resources from the mundane world to send to the Cultivation Realm.