Jeju Air Co., South Korea's largest budget carrier, said Tuesday that it will launch flight services to seven Chinese cities starting this month to meet rising passenger demand. The company owned by Aekyung Industrial Co. said it will begin irregular services from Incheon International Airport to Qiqihar, Wenzhou and Quanzhou, while flights taking off from Jeju, the company's main hub of operations, will fly to Guangzhou, Xian and Chengdu.