China Airlines (CAL) (, commonly abbreviated as Huáháng ()) () is the largest airline in Taiwan headquartered in Taiwan Taoyuan International Airport. Although not directly state-owned, the airline is owned by China Airlines Group, which is owned by the China Aviation Development Foundation (), which is in turn owned by the Taiwanese government. The airline operates flights to four continents including Asia, Europe, North America and Oceania. China Airlines has a strong presence in the Southeast Asia, East Asia, and Northeast Asia. The Hong Kong route is the airline's most profitable market with hundreds of flights flown a week between Hong Kong and 4 cities in Taiwan, including Taipei (Taoyuan), Taichung, Tainan, and Kaohsiung. China Airlines' wholly owned subsidiary, Mandarin Airlines, manages domestic flights regional flights to secondary cities with smaller capacity requirements.