The secret chamber Zhou You was in was precisely the sacred ancestral shrine of the Zhou Clan Western Sect.
As everyone knew, the foundation of a noble family lay in the residences of its clansmen. Thus, the defenses of one's own gates were often the most crucial and the strongest.
For any lineage to have endured until today, its ancestors must have produced at least one powerhouse at the Heavenly Grandmaster level. Building cities within their estates was therefore no difficult matter.
The Earth Capital was known as the "City of Ten Thousand Cities," and this had two meanings. First, Sealed Lords sat in the Earth Capital and governed countless large and small cities across the Fifty Provinces, making the Earth Capital unquestionably the central capital of all cities.
The second meaning was that the two residences flanking the Earth Capital truly contained "ten thousand cities." These cities existed in substance but had no names; they were family estates constructed by the ancestors of noble families using the Earth Grandmaster City Building Technique.
For the sake of ensuring that their descendants would flourish without end, these old ancestors had racked their brains to create systems of family residences through the Earth Grandmaster City Building Technique. The most vital area among them was the ancestral shrine and ancestral temple.
When many noble families faced powerful enemies, they gathered their elites and hid within the ancestral shrine space, waiting for reinforcements to arrive before turning the tables.
If a noble family's residence was a miniature city, then its ancestral shrine was the inner city within the Inner City—the final trump card for preserving their lives.
Generally speaking, the most important step in exterminating an entire noble family was destroying its ancestral shrine space.
For instance, the Impermanent Killers, the most professional people