Stowage222, you may be right. HKG is really a heavy player in air cargo! Here the top-10 airports of the year 2014 (starting from the biggest):
By passenger traffic: ATL, PEK, LHR, HND, LAX, ORD, DXB, CDG, DFW, HKG.
By cargo traffic: HKG, MEM, PVG, ICN, ANC, DXB, SDF, NRT, FRA, TPE.