After all, artifacts show that there were people living in Taiwan as early as 5000 years before the birth of Christ. In general, the main reason for the idea that Taiwan has only 400 years of history--except for its implications as a political statement--is because this is the shorthand way of referring to the available historical records.
從台灣現時發現的古物遺跡來看，西元前五千年島上就有住民定居，一般之所以把台灣歷史侷限在四百年，除了政治訴求的凸顯外，也是為了史料討論的方便。