The patriarch is in charge of managing matters related to the family clan or close relatives of nobility, and his duties are clearly distinguished from those of the clan leader.
The former is responsible for internal affairs, and the latter external. Therefore, the role of the patriarch has two main responsibilities: one is to manage the family roll, distinguishing the legitimate and illegitimate members and their blood relationships, and preparing the yearly genealogy. The second is controlling the clan's legal department, where all clan members who commit wrongdoings can only be judged.
Therefore, the patriarch must be fully aware of the movements of key family members to foresee and prevent potential problems.
Undoubtedly, before the Star Collection Banquet, Tang Zu had already thoroughly investigated Yun Piaopiao's background.