It was also hard for me to find discounted China Domestic Flights tickets, and it is difficult for me to book China flight air tickets on Internet. There are no low-cost airlines like Ryanair in China. You have to search every possible airlines website to find the best deal. Another problem is that, if you try book tickets on some Chinese websites and agents, it takes long-time waiting for issuing air tickets. Sometimes it even makes you frustrated! So far as I know, agents in China do not use Amadeus or Sabre but has their own system so that is why you can’t book best discount when you are in Europe or North America!
Recently, I found a good website which is helpful to book China Flights. I have ordered the discounted China Airfare on it, and it is cheaper and easy for foreigners. Their URL is
http://www.chinatraveldepot.com/ChinaFlights/