Time flows endlessly.
Time passes like flowing water, a hundred years have passed;
Another hundred years have passed;
Yet another hundred years have passed;
...
With time, everything in the world and the universe changes, humans experience birth, aging, sickness, and death, cultivators advance, Golden Pill Monks achieve and then die, Nascent Soul Monks reincarnate over several generations.
Before one realizes, it has already been eight hundred years.
Over these eight hundred years, the Xianmen Sect has not changed much; generation after generation of Xianmen cultivators are born, grow up, receive education, and then step into the Horned Ming Realm through the Domain passageway, supplementing and rotating the Immortal Sect Expeditionary Army stationed there.
Many Xianmen cultivators die in foreign lands, leaving only their Clothes Tombs to return to Xianmen, leaving their relatives with a memory to cherish.