China Southern Airlines is buying 12 additional Boeing 787-9 Dreamliners.
The US$3.25 billion purchase will allow the Chinese State-owned airline to take delivery of the Dreamliners between 2018 and 2020.
The Guangzhou-based airline says it will fund the purchase from internal resources and bank loans.
China Southern currently operates 10 787-8s.
The airplanes have enabled the Guangzhou-based carrier to launch six new non-stop global routes, connecting Guangzhou to London and Rome in Europe, Vancouver in North America, as well as Perth, Auckland and Christchurch in the Oceania area.