The various worlds were all special in their own ways. The passageways that connected to the Greater World were also very different.
For example, the Middle World that the Hall of the Dead was situated in had a passageway that only connected to the Void Battleground.
Whereas the passageway that connected the Ancient Longevity World and Greater World was a little special too. It was a passageway that had an opening that could be controlled to open or seal shut, just like the gates to the Starry Sea that Lin Feng possessed. However, while the opening could be opened or sealed, the position of the opening did change.
The opening or closing of the opening was controlled by the Gu Family.
