Most Emirates long haul flights departing from AMS,BCN or MXP seem to be that cheap, I'm sure there are other cheap airports but I'm too lazy to look. This is probably the case with all the euro airports that don't charge super high fees and lack large quantities of F pax.
I'm seeing MXP-HKG at 4000eur for a round trip, MXP-BKK for 3800eur. There are probably even better deals available if departing from some third world countries.
I guess you're from the UK, I'm seeing BHX-HKG priced at around 151GBP/hr. Shockingly, LHR-HKG looks even cheaper at somewhere around 100GBP/hr.