"Yalan, the teleportation arrays we usually use are just small openings made at the weak spaces of instances or secret realms. Fundamentally, there's not much difference from what explorers do. But in the end, instances and our current world exist in separate spaces.
It might be easy to activate a teleportation array at the same time, just like how we saw Principal Lu effortlessly create one with a wave of his hand at the doorway that day.
But teleporting directly from the real world into an instance is extremely difficult because it's essentially creating a direct channel from one world to another, which can't be done without profound strength."
Hearing this, He Yalan also finally understood what it was all about.
In short, it's a technology that's extremely difficult to implement.
