According to Analysys International's China's B2B Media Industry Research Report (released 19-June-2007) the market in China - in 2006 - looks like this:
Trade shows make up 45 percent and print publication 27 percent of China's B2B revenue share. Online media accounts already for 25% - which is quite close to total print, and by the way, my dear college Matthew Schwartz (from btobonline) - a much higher share than in many, if not all Western countries.
As an example Germany:
According to the German B2B Press Stats 2006, publisher report a share of 8 percent for online revenue - and this doesn't include much of tradeshows revenue, which in Germany is dominated from the large exhibition organizer - so it would closer to 3 percent online share vs. 25 percent, if you include tradeshows.
Total b-to-b advertising in China is expected to top 1.2 billion USD this year, up 25% from 2006 as this picture shows
(100 RMB = 9.849 Euros)
Content table of the 63-pages report (plus a free Executive Summary (.rar archive)
If you have a problem to handle an .rar archive, drop me line and I will send you this report unpacked