Introduction to the site of the “First National Congress” of the Communist Party of China in Jiaxing Nanhu: The site of the “National Congress of the Communist Party of China” in Jiaxing Nanhu is located in Yanyu Building on the Lake Island in Nanhu District, Jiaxing City. It is one of the witnesses and symbols of the birth of the Communist Party of China. It is an integral part of the "Site of the First Congress of the Communist Party of China", a national key cultural relic protection unit.