The China Democratic Socialist Party (CDSP; Chinese: 中國民主社會黨; pinyin: Zhōngguó mínzhǔ shèhuìdǎng) was a Chinese political party founded in Shanghai on 14 August 1946. It was formed through the merger of the former Chinese National Socialist Party (Chinese: 中國國家社會黨; their preferred shorthand name was "Socialists"; no relation to the German Nazi Party) and the Democratic Constitutionalist Party (Chinese: 民主憲政黨), both of which had survived the years of Japanese aggression by generally supporting the Kuomintang-led national government. The new party's first head was Carsun Chang. Along with the Kuomintang, the Young China Party and China Democratic League, it was one of the longest active political parties in both Nationalist China and in post-civil war rump Republic of China in Taiwan.