Baidu Civilization was the name the Collectors gave to the destroyed civilization after excavating its ruins.
In the third star system they explored, there were no planets, only a damaged stellar ring. Upon it, the Collectors found a vast amount of textual information. The records were highly miscellaneous, mainly documenting various events that had once occurred within Baidu Civilization. It seemed to have been written by many authors at different points in time, then deliberately collected and sealed away by a third party.
[Major Event Report: The truth behind supernatural incidents and superpowered individuals around the world has finally come to light. The cause of these phenomena is a plane we cannot observe, called the "Spirit Realm." This special spatial plane contains a large number of unknown life-forms. We are not alone in this universe. This was Baidu Civilization's first contact with extraterrestrial life, though they did not travel by spaceship...]
[Moloto Private Press News: "Planar Physics," proposed by scientist Ainlunge, challenges the throne of traditional physics. The edifice of science is facing an unprecedented challenge. Once the theory of planar physics is verified, we of Baidu Civilization will unveil a new chapter in history...]
[Baidu Federation Government Bulletin: In the eighth year of the AM Era, the Planar Physics Engine developed by the Chief Science Corps based on planar physics theory has been declared complete. This engine will use the jump principles of the Spirit Realm plane to transfer matter from our plane into the Spirit Realm plane, then transfer it back from the Spirit Realm plane into our own, thereby achieving large-scale matter displacement... After repeated experiments, this engine has effectively circumvented the physical impossibility of exceeding the speed of light. Spaceships suited for the Planar Physics Engine are now being manufactured. The age of mass interstellar migration