Become an Immortal, Only to Be Returned to the Apocalyptic Earth?

Li Meng: "Hahahahaha, today I, Li Meng, become an immortal by practicing the Tao of Gou! After thousands of years of accumulation, who dares to stop me! Who can stop me!" Tiandao: "What are you talking about? Watch me slap you back to the earth." My name is Li Meng, a time traveler without a golden finger. I have lived on my own for ten thousand years. I am about to become an immortal. I am slapped by Gou Tiandao and sent back to the earth at the end of the world. How should I survive in the face of a post-apocalyptic earth with all my cultivation and spiritual energy gone? [Group portrait➕High martial arts➕Unlimited flow➕Steady➕Decisive killing] The introduction is weak, so move on to the main text. A new author, I am very happy to learn and improve with everyone.