In fact, we can get an idea of the Chinese concept of their territory in Taiwan from a map made during the Tung Chih reign (1862-1875) of the Ching dynasty: The map only has the western part of Taiwan; the eastern part isn't even drawn in!
我們從清朝最早一幅自己繪製的台灣地圖可看出中國人對領土的觀念，這康熙年間繪製的台灣地圖，只有西部，東部根本不存在。