Introduction to Yilun Hall: Yilun Hall is located in the north of Piyong. It was named Chongwen Pavilion in the Yuan Dynasty. It was rebuilt and renamed Yilun Hall during the Yongle period of the Ming Dynasty. In the early years, it was the place where the emperor gave lectures and Piyong was built. Later, it was converted into a collection of books in the prison and an office area for teachers.