The Taiwan police system at that time only played as a supportive role, like performing frequent surveillance, for example. Nevertheless, the governmental body of Taiwan police system back then was and still is subjective to the supervision and coordination of National Security Bureau of the ROC National Security Council. The main secret-police work were held up by other security units listed below. Several units in the past like National Security Bureau or National Bureau of Investigation were much more fearful or despicable to the people of Taiwan. However, by the end of the Martial-Law era, these so-called "secret police" units were legalized, transformed into intelligence-oriented or law-enforcement units, or even disbanded.