What is the Dujiang 都讲？

The Dujiang is one of the "Three Masters" and serves as the deputy of the High Priest.  

The person holding the position of Dujiang must "be thoroughly versed in the teachings, proficient in laws and regulations, skilled in chanting rituals, and capable of leading the congregation." Their duties include "guiding movements in the mysterious altar, ascending the seat to expound doctrines, meeting the expectations of the people, and resonating with their hearts," essentially overseeing chanting, praise, and guidance.