In Hong-Kong International Airport, all Cathay flights are operated from Terminal 1. Cathay has its own pier, which is the southern branch of the "Y" of HKIA. Gates numbers are from 40 to 50.
This is a map of HKIA terminals :
Cathay is part of the FLYgreener program and has made a commitment to fly greener planes and to reduce its CO2 emissions.