Since there was enough evidence that Xue Yan was Doctor Bai, there was also enough evidence to prove that Doctor Bai had a space that led to a different world, and that space was indeed unstable. There was also enough evidence to know how Doctor Bai and the commanders in Area D knew that their superpowers could be transferred, how they were transferred, and what the aftereffects were… With these, it showed how accurate Jiang Yue's analysis was at that time.
Having all these facts as backup, her hypothesis could be confirmed and verified.
Doctor Bai transferred the space that leads to the non-passing world to Jiang Yue.
That space is biased towards the original owner.
Jiang Yue has two spaces now. The two spaces are still in the process of merging. They have not completely merged yet.
The few gray buttons correspond to a door that leads to a different world.