In international air transport, there are standard short name of each airport created by IATA. The airport short name is formed by three capitalized letters for easy recognition.
PEK – Beijing Capital International Airport
HKG – Hongkong International Airport
CAN – Guangzhou Baiyun International Airport (CA/QR/TK/EY/MS/NH to Middle East and Africa)
PVG – Shanghai Pudong International Airport
SHA – Shanghai Hongqiao International Airport
CTU – Chengdu Shuangliu International Airport
SZX – Shenzhen Baoan International Airport (CA/HU/CZ/MU to Europe and North America)
KMG – Kunming Changshui International Airport
XIY – Xi’an Xianyang International Airport
HGH – Hangzhou Xiaoshan International Airport