The Rise of the First Emperor's Star Chart Civilization

I don't know how many splendid civilizations have been born in the boundless universe, but no matter how powerful the civilization is, it will perish in the long river of history. It is difficult for two civilizations to be born in a galaxy at the same time, because the conditions for the birth of each civilization are very harsh, and technological civilization is a drop in the ocean. I wonder if two technological civilizations have ever collided in the vast universe. If so, it would be so tragic and cruel. >Who would have thought that the star map from the Mausoleum of the First Emperor was actually the last "fire" left on the escape route from a civilizational era in the Milky Way. And what is the origin of the current earth civilization and the previous civilization era?