KLM have a sale (not a mistake fare) with great business class fares from a variety of German airports to at least three China airports: Chengdu, Hangzhou and Xiamen.
I used Google flights to search for HAM, FRA, MUC, BER to HGH, CTU, XMN and found 25th March to 1st April for £762 which is EUR999. The search includes multiple departure and arrival airports but I can now only see this price for Chengdu.
I also tried 13th May to 21st May and got a similar price:
Again, the search includes multiple departure and arrival airports but I can now only see this price for Chengdu.
The flights go via Amsterdam but when I put AMS in the outbound search field the price jumped to the fare you would expect £2000.
I did try putting Prague in the outbound field and was able to find the same sale fare. So you may find that you can get a deal from your Europe home city. I tried London and the fare went up to £2400.
You need to book by 31st March 2015 and travel dates are from 15th February 2015 with no latest outbound date – although I couldn’t seem to find these fares past October. Stays are between 7 days – 1 month. To get these fares outbound needs to be on a Tuesday/Thursday and the inbound on a Monday/Wednesday.