Long before Gu Jinlai was crowned as the King of Tian Nan, he had already devised a plan to attack Yan State.
Moreover, since only the Black and White Sand Sea separated the Purgatory Sect, the Netherworld Sect, and Yan State, they similarly understood the Thirty-Six Tribes of Yan State.
Thus, Gu Jinlai was not entirely ignorant about the four Yan States of the southeast, northwest.
The area of the four Yan States, compared to the Four Great Mu States, was not inferior, and combined, Star State, Jiangzhou State, Yellow State, and Red State, amounted to less than the four great Yan States.
This area belonged to Jialou Divine Mountain over a hundred years ago and was ruled by this massive power.
However, with the Daqian Dynasty rising strongly two hundred years ago after acquiring the relics of the Holy Sanctuary, not to mention Devas and Saints, the Emperor Master Tai A was an Earthly True Immortal level existence.