Envoy of the Nine Dynasties

You said that you can be free and happy by cultivating yourself to become an immortal; You say that understanding the Great Way can lead to immortality; You say that the starry sky is invincible and can rule all realms; But you also said that once you enter this door, everything will collapse! ... The protagonist Yang Yi meets other protagonists from all over the world across time. What kind of sparks will they create? What exactly is under hell, above all realms, the source of strangeness, and the door to all wonders? This book contains a lot of suspense, so please read it carefully...