The Unaging Immortal Mountains was in the center of three major powers of the eastern regions - near the Thirteen Prefectures, Paragon Sword Sect and Taihua Immortal Dynasty. It was still extremely famous as after all, it was an emperor-ranked power.
But because the Unaging Immortal Emperor was merely an initial-stage emperor, he didn't have much influence when compared to the other hegemons of the eastern regions. But even so, immortal emperors were rarely seen existence, and even in the perspective of the entire immortal realms, although there are a number of emperors, they were still existences who stood at the absolute peak.
Any immortal emperors were able to become the tyrants of an area, lording over everything.