Immortal World.
More than a thousand years ago, after Su Yu broke through to the late-stage Tribulation Crossing Realm, he brought Nan Xiaogu through the Heaven-reaching Immortal Formation on the Immortal Mountain to reside in a small valley in the Immortal World.
He took Nan Xiaogu to Yinfeng Immortal City and several other Immortal Cities nearby, or to the famous Independent Practitioner Marketplaces.
During his travels, Su Yu familiarized himself with the surroundings of the Immortal World while searching for traces of Emperor Zhenwu and others who had ascended to the Immortal Realm in days past.
He did manage to find some traces.
Back then, when Emperor Zhenwu and others ascended to the Immortal World, Emperor Zhenwu used his foundation from the past to break through to the early-stage Heavenly Immortal Realm, which attracted the attention of the Heavenly Court. Ultimately, under the solicitations of various forces, Emperor Zhenwu chose to join the Heavenly Court.
