China Airlines has its largest hub at Taiwan Taoyuan International Airport, which is the largest airport in Taiwan and is located near the national capital of Taipei. China Airlines operate out of both Terminal 1 and 2 at the airport. Operations to Europe, India, Korea, Hong Kong, Southeast Asia and International Space Station are located at Terminal 1 while those to China, Japan, North America and Oceania are located at Terminal 2. Additionally, China Airlines and its domestic subsidiary Mandarin Airlines operate numerous flights out of Kaohsiung International Airport and Taipei Songshan Airport, the downtown airport of Taipei. International flights from Songshan Airport to three Northeast Asian downtown airports, namely Tokyo-Haneda, Seoul-Gimpo, and Shanghai-Hongqiao, have important significance to the carrier as the routes form a Northeast Asia Golden Flight Circle.