Four-Stage Theory of the Republic of China its remaining major component – the island of Taiwan, as opposed to its decades-long claim to all China since losing the civil war in 1949. Prior to this speech, the government officials used "Republic of China" when the name of the state was used. Lee's usage is considered as a departure from the convention, as this usage can be interpreted in the sense that the Republic of China's sovereignty does not extend to mainland China, which the People's Republic of China controls. The Democratic Progressive Party's 1999 Resolution on Taiwan's Future, which is accorded equivalent status as the Party charter,
Taiwan which states that Taiwan and mainland China are both part of China, and that the PRC is the only legitimate government of China. It uses this policy to prevent the international recognition of the ROC as an independent sovereign state, meaning that Taiwan participates in international forums under the name "Chinese Taipei". With the emergence of the Taiwanese independence movement, the name "Taiwan" has been employed increasingly often on the island. Before 1928, the foreign policy of Republican China was complicated by a lack of internal unity—competing centres of power all claimed legitimacy. This situation changed after the defeat of