Master, How Do You Know That I Am from Earth?

After traveling through the world of immortality for ten years, Chen Xun always thought that he was just the most useless outer disciple of the Qinglan Sect. Until the stage of life and death, he was nailed through the shoulder with a sword. The master who usually only sweeps floors and raises chickens suddenly asked him: "Missing home?" Chen Xun froze. Because he never told anyone that he was from Earth. The master said: "The road to immortality is too long. If you feel tired, just tell your teacher." "I will take you home as a teacher." "Go back to that... Blue planet you dream about every night." Later, Chen Xun realized that the master was no ordinary old man. Instead, he is the gatekeeper of Guixu who has guarded the coordinates of Blue Star for ten thousand years. All the gods and demons are looking for his home. And he is the only way.