The Zhou Family already had specific rules regarding the use of Foundation Establishment Pills.
One either needed to possess superior Spirit Root Aptitude, make significant contributions to the family, or accumulated five thousand merit points.
Therefore, if someone couldn't meet even one of these three criteria, even if they were the biological children of a Purple Mansion Phase Cultivator of the family, they couldn't obtain a Foundation Establishment Pill from the family for their Foundation Establishment.
Nowadays, the Zhou Family still had three Foundation Establishment Pills that no one had used, which was a sufficiently large number.
Even if one were reserved for Zhou Xinyan, who possessed superior Spirit Root Aptitude, there would still be two pills available for other clan members to use.