Actually, there's one more point that Xu Xin didn't mention: the untransplanted treehouse of Li Wenxi has a real protection zone extending six kilometers in radius, demarcated by the spread of the treehouse's roots.
As the treehouse continues to grow and upgrade, it's certain that the real protection zone will continue to expand.
However, a parasitic treehouse has no protection zone whatsoever. Although the original treehouse site left in place still retains a protection zone, it's merely a deterrent type. It might be useful in relatively safe conditions now, but once a real crisis hits, this protection zone could just be decoration.
Most importantly, this deterrent type of protection zone will not expand any further.
He is counting on the protection zones of the treehouses around them to continue expanding in the future, fully covering and connecting this area, forming a genuine, fully connected, safe domain belonging to them.
