Introduction to Haiyuan Pavilion: is one of the most famous private libraries in Chinese history. It was built in the 20th year of Daoguang reign of the Qing Dynasty and has been carefully guarded by four generations. It has a total collection of more than 4,000 kinds of books and 22 books. There are more than 10,000 volumes, including more than 10,000 rare volumes from the Song and Yuan Dynasties.