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

Hong Kong Civil Aviation Department
http://www.cad.gov.hk

Hong Kong International Airport
http://www.hongkongairport.com

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

Royal Aeronautical Society (Headquarter)
http://aerosociety.com

Royal Aeronautical Society (Hong Kong Branch)
http://www.raes.org.hk

SAE International - HK
http://saehk.org