From Mars to Earth

Guanxing grew up on Mars. After experiencing a spacetime overlap, a phenomenon previously known only from scientific theories, he finds himself on Earth. His consciousness merges with that of an Earth native who shares his name. While working at an observation base on Mars, he discovers an underground warm lake inhabited by ancient giant fish, a cave leading beneath the surface, and a fantastical subterranean world. He also finds a spaceship from outer space. Then the country develops at a breakneck pace, and he gets the chance to set foot on Mars again...