SF Express Co., Ltd. is a Chinese multinational delivery services and logistics company based in Shenzhen, Guangdong. It is the largest courier in China, and provides domestic and international express delivery. SF Express has a fleet of 69 cargo aircraft, including 37 Boeing 757, 17 Boeing 737, 13 Boeing 767 and two Boeing 747 all-cargo freighters, which are owned by its subsidiary SF Airlines. As of 2018, it has transported around 2 million tonnes of cargo, since its operations began in 2009. The parent company of SF Express, SF Holding trade on the Shenzhen Stock Exchange, and it is a constituent of SZSE 100 Index. Wikipedia