There Are Three Thousand Worries in the World, but the Worry of Eternal Life Is the Only One That Kills People

(No system, longevity style, no sword, no female protagonist, the male protagonist is alone, and the supporting characters are well integrated) I have slept for thirty thousand years with my eyes closed, but I still need to wake up from the big dream. For ordinary people, the end of the journey of cultivation is eternal life, but for some people, they stand at the end from the beginning, and one stop is endless years. The world has gone through many changes, but there are always people watching everything. Everyone in the world seems to have seen him before, but no one can recall his appearance. They can only vaguely remember that he was a man in black. "When I first wake up from a big dream, the weather is just right. It's a good time to visit old friends and find new love." The story begins... (The chapters in this book are arranged according to the timeline of the story, and those that have little relationship with the protagonist = interludes ≈ extras)