Refining an external world to incorporate it into one's independent world isn't difficult in essence.
As long as one attains a high enough level, has a sufficiently vast independent world, and possesses enough patience, it can be achieved.
However, refining an external world and forming a complete Mini World are two different matters.
The greatest challenge in forming a complete independent Mini World is the need to sever its connection with the Big World it is located in. This process is akin to confronting a Big World directly.
Attempting to conquer the greater with the lesser is not feasible on this level.
What defines a Big World is not merely its size.
It's more about the robustness and depth of the Heavenly Path that are unfathomable.
Indeed, because it involves the Heavenly Path, ordinarily, refining a Mini World would be an impossible endeavor.
No matter how resolute an individual's independent world is, it could never rival the Heavenly Path of a Big World.
