The Ten Thousand Great Mountains, of course, aren't literally composed of ten thousand mountains or stretch across ten thousand miles. In reality, they are divided into three mountain ranges, consisting of forty main peaks and several hundred perilous ridges, extending ten thousand miles from east to west.
The activities of the Mo Zhu Mountain are mainly focused on the eastern section, from Tianyu Mountain to Nanyu Mountain, encompassing fourteen mountains, which together form a mountain range spanning six thousand five hundred miles.
In fact, the entire Ten Thousand Great Mountains originally marked the border of the twelve countries of the Immortal Palace, and should have been guarded by the imperial guards of Li Country from the Immortal Palace, with the Nangong Immortal Families responsible for defense.
However, after years of relentless attacks and internal strife by the Xuanmen Divine Teachings, the influence of the Immortal Palace had long since weakened.