The Tun Hwa Radio fleet, originally established as a test case by the Institute of Transportation of the Ministry of Transportation and Communications, has a regular clientele due its being the oldest fleet and its good reputation. Surprisingly, men make up nearly 40 percent of its customers. Among them are passengers who often go to or from the airport or to central or southern Taiwan on business.
而前身是交通部運研所實驗台的「敦化無線電」則因牌子老、信譽好，常客也多；其中男性比例竟將近四成，常有往返機場，中南部洽公、談生意的「商務乘客」。