After Time Travel, I Used Scientific Methods to Cultivate Immortality

Protagonist: Lin Feng Modern identity: A top student in the Department of Physics/Chemistry of a top university. He has strong logical thinking, believes in science, and is a firm materialist. Maybe he's also a science fiction fan or tech nerd. Identity after time travel: A recognized "waste" in a small immortal cultivating family or sect. His spiritual roots are blocked, his meridians are weak, he is completely unable to draw Qi into his body, and he is ridiculed and bullied.