In the Ching Dynasty, there are abundant researches regarding the frontier guard system, most of which emphasize on the period before the Reign of Emperor Guang Xu. After Taiwan’s cession to Japan in 1895,the frontier guard system collapsed, and the wild aborigines took back the territory demarcated during the Ching Dynasty. The final lineation of the frontier guard was formed in 1902 during the Japanese Colonial Period.
The thesis was done with a large amount of field investigations and meticulous historical researches. The advancement numbers during the Japanese Colonial Period and aboriginal boundary mapped by GIS were indicated here.
Regarding geographic locations, fortifications, traditional indigenous territories, official aboriginal policies, the advancement of defense lines of frontier guards comprise six periods.
The four processes are necessary for circumscription of aboriginal lands into general administrative areas. The fist one is to conduct via surveying and mapping. The second is cadastral registration. The third is land development and immigration. The fourth is to adopt household registration and taxation. Different policies are implemented in different regions. In the north, advancement of defense lines of frontier guard is conducted; in the south, official residences of aboriginal affairs are set up. Besides, Japanese government includes aboriginal lands into national administrative governance. The governance consists of three types.
After 1920, more aboriginal lands were circumscribed to general administrative regions, and the defense lines of frontier guards were replaced with aboriginal ruling roads or with the boundaries of aboriginal villages and plainsmen townships.