China United Airlines (CUA) is a Chinese low-cost carrier operating under IATA code HR and ICAO code CUA, with the callsign LIANHANG. Founded from military aviation roots, the airline transitioned into a civilian carrier and has grown to serve numerous domestic routes across China. The airline is a subsidiary of China Eastern Airlines Group, one of China's major state-owned aviation conglomerates. This relationship provides CUA with operational support and network connectivity within the broader China Eastern ecosystem. China United Airlines primarily focuses on domestic routes, offering budget-friendly fares to price-sensitive travelers. Its main base of operations is Beijing Nanyuan Airport, which was historically its primary hub before that airport's closure, after which operations shifted to other Beijing-area facilities.