華信航空
On 8 August 1999, China Airlines formally merged its subsidiary, Mandarin Airlines, with Formosa Airlines under the Mandarin name. Mandarin took over Formosa's domestic operations and aircraft while Mandarin's fleet and most of its international flights were transferred to China Airlines. In early 2000, the airline bought 5 Dornier 228 from Uni Air to fly outlying routes. These planes were sold to Daily Air in 2005, a helicopter carrier in Taiwan which had won the bid to fly these money-losing routes.