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,
Flag of the Republic of China ally in the People's Republic of China. The PRC has criticized Taiwan independence groups for wishing to change or abolish the ROC flag, and has implied that legal steps to do so would bring a strongly negative reaction from the PRC. However, the presence of the ROC flag in Taiwan also distinguishes the fact that Taiwan and ROC territorial islands elsewhere fall under jurisdiction of a country separate from that of mainland China, the People's Republic of China (PRC). The hoisting of the ROC flag is even advocated by the most extreme Taiwanese independence supporters, such as Taiwan Solidarity Union