Yu Luo Mountain, naturally, was the ancestor of the Water Uncle Sword Emperor and Yu Xuanwei.
In the book, the word "Master Ancestor" proves that the Nanwu Sword Sect indeed had a source, and that source was on the other side of the Ancient Teleportation Array.
Similarly, this also indicated... that the first Sect Leader of the Nanwu Sword Sect did not have a high status in that sect, at least he was not qualified to touch the Cultivation Method of the Purple Mansion Realm.
As for the "Master Ancestor's secret words," it likely wasn't something he overheard secretly.
But even if it was overheard, he brought these words through the Ancient Teleportation Array to such a place, and he himself had already reached the peak of the Crimson Palace stage, naturally, he was thinking of a breakthrough.
The breakthrough point fell on the fourteen words "Profound Heart, endure hardship, never part, Divine Soul first unites with heaven and earth."
