I found a pretty good site for some info on train travel in China.
http://www.seat61.com/China.htm
The gapadventure travel plans are not extensive enough. The narrow scope plans are already expensive.
To have them customize one would cost an arm and a leg, thus no going anywhere! hehe
Gap Adventures has some decent trips in China, if you are looking to travel with a group.
www.gapadventures.com
www.gapadventures.com
