As I understand, Wuhan-Guanzhou line is just an eye opener and a starter for bigger projects. China is aiming to create a inter-city commuting high speed train grid. That means most trains run like bus, and part of them as normal long distance mass transport.
An example, if a 1000KM line connects, say 8 cities, most of the trains will run point to point with a 30 minutes interval. Only some trains run longer or full length. I think for ordinary commuting trains, the working speed could be lowered to even 250KM, at least for some near cities.
China is building 3 hours city rim. That's to say, building highway and high speed train grid to connect cities, thus any adjacent big city takes less than 3 hours travel. As you may know, many people work in Shanghai but inhabit in near city Suzhou. This is one thing I like very much - people can scatter to small cities or towns instead of rushing into already too big Hellpolises.
I trust all the projects we have seen or known are just the beginning. To get the whole picture, we need wait for many more years. But I know one thing, for every ordinary new rail line, the design sets the working speed for 250km, but leaves potential for 350KM or higher.
Another line can demonstrate our ambition, even though it does not look like a big project. China is building Yichang-Wanzhou railway (to be finished in 2010).
Length: 377.46KM
Tunnels digged: 159
Bridges: 253
Tunnels and bridges take 74% of the full length
Investment: $3.5 billion
This line takes 6 years to build. Ordinarily for a railway this long, China can build it in 3 years. The reason is almost the whole line runs through mountains.
Dont underestimate high speed trains. Some airliners have been stopped under the competition of high speed railways. Most of them have Wuhan as the departure. And many airlines bring down their ticket prices to almost equal to or even lower than trains. For example, as I know, if you book 15 days before, you can fly between Wuhan-Guangzhou with about $20.00. To be exact, RMB140.00. Please remember it's for a 1000KM+ journey. I like this kind of competition.
I still think average price of high speed trains is too high for poor Chinese. I expect it to be lowered.