Dang Guo in the context of "Democratic Progressive Party"

The Three Principles of the People (Chinese: 三民主義; pinyin: Sānmín Zhǔyì), also known as the Three People's Principles, San-min Doctrine, San Min Chu-i, or Tridemism is a political philosophy developed by Sun Yat-sen as part of a philosophy to improve China during the Republican Era and later in Taiwan during the Dang Guo era. The three principles are often translated into and summarized as nationalism, democracy, and the livelihood of the people (or welfarism). This philosophy has been claimed as the cornerstone of the nation's policy as carried by the Kuomintang; the principles also appear in the first line of the national anthem of the Republic of China.

The Temporary Provisions Effective During the Period of National Mobilization for Suppression of the Communist Rebellion provisions of the Constitution of the Republic of China were effective from 1948 to 1991 and amended four times by the Central Government of China. They effectively nullified the constitution and established martial law in Taiwan, where civil and political freedoms were curtailed. The official rationale for the provisions was the ongoing Chinese Civil War. However, with the demise of the Kuomintang single-party system, the provisions were repealed.

The Government of the Republic of China is the national authority whose actual-controlled territory consists of main island of Taiwan (Formosa), Penghu, Kinmen, Matsu, and other island groups, collectively known as Taiwan Area or Free Area. A unitary state, the ROC government, under the current constitutional amendments, is run by a de facto semi-presidential system, consists of the presidency and five branches (Yuan): the Executive Yuan, Legislative Yuan, Judicial Yuan, Examination Yuan, and Control Yuan. The president is the head of state, with the premier as the head of government, currently ruled by the Democratic Progressive Party (DPP) since 2016. Since the 2005 amendments of the Additional Articles of the Constitution, the Legislative Yuan has been the de facto unicameral parliamentary body of the country.

Originally established in 1912 in Nanjing, the Government of the Republic of China relocated several times before finally moving to Taipei, Taiwan, in 1949 because of its military losses in the Chinese Civil War. Up until the 1990s, the government has historically been dominated by the Kuomintang (KMT) under the one-party state Dang Guo authoritarian regime, before evolving into a multi-party democracy after martial law and the climate of White Terror gradually ended. This government was the internationally recognized official government of China until 1971 by the United Nations and until 1979 by the United States.