It's Almost Over, but You Still Can't Become a Little Immortal?

The book begins: "Do you believe in cultivating immortals?" "Can't believe it at all." So Tang Dian traveled to the world of immortality and became a dot. "Hey, that's not how you cultivate immortality. You don't have senses, a body, and a system. You can't cultivate at all." End of book: "Tang Xianzun, congratulations on your successful enlightenment. What are your next plans?" "I'm going to try to introduce the air into my body." In short, this is the story of a 16-year-old doctor who traveled to a world of immortality but was unable to achieve immortality.