Things changed so much in Xi'an between 2006 and 2009 when I lived there. The pace of development is hard to comprehend. I know that when Qian and I go back to Xi'an this coming summer, after being gone for twenty months, there are going to be many parts of town that we won't recognize.
Reading a post from my friend, Richard, on his blog - Notes From Xi'an - I see that Xi'an has indeed added something major since I left: a high-speed rail station.
The Xi'an to Zhengzhou line high-speed rail station
Richard's post does a nice job giving basic information about the new "Xi'an North Station," highlighting the controversy surrounding the corruption of China's ousted high-speed rail minister, and discussing whether high-speed rail is really a wise investment. Check it out.