Looking across the five thousand years of Lu Country's history, one can see that "the great trends of the world, long divided, must unite; and long united, must divide."
Historians from former lives learned from Mei Yingxue about the history of the Cultivation World, and they gathered that it also follows the pattern: "Great sects, at their weakest, will revive, and at their peak, must decline."
According to Mei Yingxue, the earliest origin of the Emei Sword Sect was during the great wars between the Human and Demon Races, serving as a bastion for the Human Race's counteroffensive in Nanjiang's hundred thousand mountains, and after the Human Race's victory, it became a sect based on the duty to defend against the Demon Race, continuously growing in power.
Ultimately, internal strife led to its disintegration, with nearly all its Sword Immortals fleeing.