Air China Ltd is a China-based company principally engaged in the provision of air passenger transportation, freight transportation, postal transportation and maintenance services in Mainland China, Hong Kong, Macau and foreign regions. The Company operates its businesses through two segments. Airline Operations segment mainly comprises the provision of air passenger and air cargo services. Other Operations segment comprises the provision of aircraft engineering and other airline-related services. The Company is also engaged in domestic and international business aviation businesses, plane business, aircraft maintenance, airlines business agents, ground and air express services related to main businesses, duty free on boards, retail business on boards and aviation accident insurance sales agent business. The Company mainly conducts its businesses in the domestic market and overseas markets.