Shenzhen Airport Co. Ltd is mainly engaged in cargo and passenger transportation and security services for transit flights. The company runs the Shenzhen Baoan International Airport, which has over 120 routes covering over 90 cities domestically and abroad and is one of four major aviation transportation hubs in China. Shenzhen Baoan International Airport was the first modern international airport in China to integrate various transportation means, namely sea, land and air. It was the first international airport to adopt air cargo services and has become a transit hub for cargo.