Introduction to Sun Yirang Memorial Hall: Sun Yirang, the son of Sun Yiyan, the owner of Yuhai Tower, was elected in the sixth year of Tongzhi. Sun Yirang was born in Pandai, Ruian. He moved to the city as a young man and started writing his first book at the age of 13. At the age of 40, he moved into Yuhai Tower as a place for his collection of books, scholarship and writings. He was a master of learning and thought. He published 35 books in total in his life, mainly It is a manuscript, such as "Mozi's Interpretation", "Zhou Li Zhengyi", etc., a famous Confucian master, patriot and great educator in the Qing Dynasty of my country. He is known as the great master of Confucian classics, the master of Pu Xue, the master of Chinese studies, and the pioneer of oracle bone inscriptions research. The originator, the father of modern new education, and the pioneer of China's industrial salvation. Together with Huang Yizhou and Yu Quyuan, he is known as the "Three Masters of the Late Qing Dynasty".