Prisoners of the Countercurrent

As everyone moves from death to birth, the body becomes younger and younger as it lives, and the memory becomes more and more blurred as it lives. People don't know where they come from and where they are going, they just "walk backwards" and "live" numbly. Believers regard "birth" as the ultimate liberation, and believers hold a grand "Return to Zero Celebration" at the end of their lives. My name is Lin Yuan, a chatty math genius who just had a subway accident...