The Door to Immortality

One day, a door suddenly appeared in the sky. Countries continue to send investigation teams to investigate, but there is no news from these investigation teams like a stone sinking into the sea. Until one day, a dying figure walked out of it, leaving only the words "Becoming an Immortal" and an ancient book. Through people's continuous interpretation of this book, an incredible world gradually emerged, and at the same time, the world was quietly changing... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.