If you need to be in Hong Kong at christmas then this is by far the cheapest flights available at the moment.
Only comes up if you specifically choose Qatar Airways as the airline on the http://www.travelpack.com
website. Doesn't appear on any other website. Going from Gatwick, £10 more from Heathrow.
Cheapest indirect with another carrier at this time is £537 with Finnair, which is nowhere near as good an airline. Direct flights are over £700.
Fare rules are blank for some reason, but I have booked and received correct ticket references and can view my flight booking on the Qatar website. Have had Qatar confirm that the booking is correct.