Where was the airline which has Gimhae International Airport  as the main hub based? 
Gimhae International Airport:  Gimhae International Airport is the main hub for Air Busan. Air Busan: Air Busan Co., Ltd., operating as Air Busan () is a low-cost airline based in Busanjin-gu, Busan, Republic of Korea.
Busanjin-gu, Busan