Introduction to Haoyitang: Haoyitang, also known as the "Smoking Cessation Center", was built in the Republic of China. Siheyuan, stone hall. The entire courtyard is 20.2 meters wide, 20.1 meters deep, and covers an area of 406 square meters. In the main hall, there is a plaque with "Eager for Justice and Love of Justice" written on black background and gold on it, and two people have their heads wiped in secret. During the Republic of China, the owner of the house, Tong Hongcao, once ran a smoking cessation center and paid for meals to help people who were addicted to opium to detoxify themselves. His reputation spread far and wide. In the 22nd year of the Republic of China, in recognition of Tong Hongcao's righteous spirit in serving the people, the county magistrate Li Hanfu personally inscribed a plaque with the words "Emergency for Public Service and Good Justice".