In today's Milky Way, due to the widespread use of hyperspace engines, most civilizations could not enter places without hyperspace channels.
This newly discovered special galaxy was one such case.
There was no hyperspace region around it or a hyperspace channel. Although it was in the Milky Way, it seemed entirely out of touch with the Milky Way.
Even though it was possible to sail to this place with thrusters, it would take thousands of years of preparation.
A normal civilization would not waste time on such a thankless task. In a sense, this place seemed to be specially prepared for the lost empire.
Li Wenyuan's research spaceship had teleported here with Gray Wind, so he didn't have to travel long in interstellar space.
As the galaxy coordinates excavated from Earth's ruins, he had reason to believe that humans left it behind.