General Administration of Civil Aviation of China
http://www.caac.gov.cn

Hong Kong Civil Aviation Department
https://www.cad.gov.hk/english/index.html

Hong Kong International Airport
https://www.hongkongairport.com/en/

Hong Kong Productivity Council
https://www.hkpc.org/en

Royal Aeronautical Society (Headquarter)
https://www.aerosociety.com/

Royal Aeronautical Society (Hong Kong Branch)
https://www.raes.org.hk/index.html

SAE International - HK
http://www.saehk.org/