In ancient times, there were three Yis: Lianshan, Guizang, and Zhouyi.
The world only knows that the Book of Changes was passed down to the world, and that all Lianshan and Guizang were buried in Xuanxu underground.
There was a secret ancient dynasty in the pre-Qin Dynasty called the "Guixu Dynasty", which was not recorded in the official history. The emperor spent his life building a nine-story underground ruins array to collect strange magic, ancient corpses, artifacts, and ancient remnants in an attempt to use the ruins to defy heaven and change his fate and achieve immortality.
For thousands of years, the world has been divided into three factions:
• Shouxu Clan: Guarding the nine-story Xuanxu for generations, prohibiting the world from prying into the underground secrets
• Visitors to the ruins: Various factions are fighting among the people, coveting the treasures of the ruins, and generations are involved in the game.
• Zhenxuansi: The official secret agency of past dynasties, erasing the traces of Xuanxu and sealing the secret history of ancient times.
