Andrew/Delboy
Out of the top of my head I do not know the names of these smaller web sites.
I booked mine at hoodaki.com and on the actual web site it asks you if you want to talk to Customer Services(A bit like MSN Messenger)This I did and spoke to a lady called Carol.She was the one that got me the Qatar flight.436 pounds inclusive.
Delboy all you have to do is put into google search engine and type in China flights and literally hundreds of sites come up on the screen.This you probably know.BE PATIENT and try them all.I have the time because I am retired.Maybe you don't because you work.It normally takes me 4/5 days of looking but not all day.Just a couple of hours here and there.
A friend of mine got one for 523 pounds to Guangzhou last week with Finnair,so they are about.finnair.co.uk
I can't look for you unfortunately because I am here to see my wife and have a holiday.But as I say the cheap flights are there somewhere.
Good luck.
Dave and Wu Ming