Who else was a connoisseur like Xu Jing in the late Eastern Han Dynasty? Does Zheng Xuan count?

Xuanmen's learning, used in architecture, is geomantic omen; Used for personal future divination is numerology; Used in ruling ideology, it is pure inaction; Used to predict events, it is pure divination;

Zheng Xuan has two identities, one is the successor and organizer of Confucianism; The other is pure divination; Xu Shao and Xu Jing are numerology; Two different people, but both are mysterious.

Learning the knowledge of Xuanmen is also useful today. We can systematically study the silk book Laozi of Mawangdui Han Tomb as the basis.

My humble opinion is for reference only.