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,
Free area of the Republic of China used, especially in contexts of trade and exchange. In contrast to the "free area" is the "mainland area", which the Act Governing Relations between the People of the Taiwan Area and the Mainland Area defines as "the territory of the Republic of China outside the Taiwan Area." However, on more practical grounds, the "mainland area" refers simply to mainland China. In addition, there are two other Acts defining other "areas": the "Hong Kong Area" and the "Macau Area". The hand-over of these former European colonies to the People's Republic of China necessitated laws governing the relations of the Taiwan Area