Also, in Taiwan, another contradiction was the radio call signs for the fire trucks or rescue vehicles. For reasons to avoid unwanted attentions and to remain secrecy, all radio call signs for all police vehicles were uncorrelated with the missions of the subject vehicles, unnecessarily including fire trucks, rescue vehicles, and ambulances of fire brigades. When fire police teams were responding to an emergency situation, these confusing call signs inevitably led to chaos and time delay. A successful fire chief, Chao Kang (趙鋼), convinced the police high command to rearrange the radio call sign assignment for all fire vehicles. Chao Kang then was appointed as the Commissioner of Taiwan Provincial Fire Administration, and the Director-General of National Fire Agency from 10 September 2000 to September 2002.