A distance of over ten thousand Black Hole Units—even with the Ninth Generation Black Hole Engine, it would take more than a month to cross.
However, once the distance had closed to within ten thousand Standard Black Hole Units and the Trova Universe entered scanning range, Lin Yu discovered something.
The fleet over there was rapidly disappearing through some unknown method.
At this rate, it would take less than half a month for all those fleets to vanish.
It was an extremely strange situation. Lin Yu's side had detected no sign of the other party opening a Black Hole Cavity teleportation channel, and those fleets were not moving—they were simply vanishing without warning.
The situation was immediately reported to Lin Fan, who directly sent the scan data to Luo Li.
When it came to matters within the Black Hole Cavity, if he did not understand something, asking Luo Li was never wrong.
After all, the Great Xia Federation had once been the most powerful civilization in the Black Hole Cavity for tens of billions of years. As the Great Xia Federation's former chief scientist, Luo Li would definitely be able to identify whatever technology the other side was using.
"You mean a Cross-border Device?"
"Yes, a Cross-border Device. It is used to cross the barriers between Black Hole Cavity Realms, allowing rapid movement from one Black Hole Cavity Realm to another!"
"I see. Then I'll have Lin Yu keep putting pressure on them. If they want to go back, let them go back. Time is on our side!"
After understanding the situation, Lin Fan nodded.
The Azure Dragon Universe was a special universe. Not only did it possess self-awareness, but civilizations born within it developed and evolved far faster than those in other universes.
Just look at Black Hole Lifeforms.