Introduction to Yilan Pavilion: Yilan Pavilion is surrounded by water and stone railings. It is connected to the lakeshore by two small stone arch bridges. It was once used as the secret room of the Taiping Heavenly Kingdom palace. It was rebuilt in the ninth year of Tongzhi in the Qing Dynasty. During the Republic of China, this place The office has successively served as the National Government’s Senior Staff Office, General Staff Headquarters and Office of the Military Affairs Bureau of the Presidential Palace.