I Transmigrated to a Cultivation World! Why Is It a Wandering Earth?

Where's the promised cultivation world? Why is it The Wandering Earth? The story follows Lin Feng, who is brought to The Wandering Earth by the System. He cultivates while struggling to survive the apocalypse, living through the Engine-Building Era, the Braking Era, the Lunar Crisis, the Jupiter Crisis, the Wandering Era, the Asteroid Crisis, and the Rebellion Era. By the time they reach Proxima Centauri, the protagonist has reached the peak of the Nascent Soul stage and thinks he's invincible. Just as he's about to say, “I don't eat beef,” he and the human leadership witness the Dark Forest theory. The revelation scares him half to death, so he comes clean and demands that everyone cultivate. Then the cultivators, who have gradually advanced from a technological civilization to a god-level civilization, wage war against the technological civilization.