I found it interesting that my impression of "traditional" Chinese dress was actually Manchurian style. I'm guessing that most of our first impressions of China and its culture were formed during the 1800's when there was an influx of immigrants to this country and England's Colonial occupation of China brought the "orientalist" fad into being. I think that coincided with the victorian era. Don't bet on my scholarship though.
Welcome 77, can you give us a quick rundown of the dates of the various dynasties, and when the Han was most prominent? (I could also Wiki this)
http://en.wikipedia.org/wiki/Eastern_Han_Dynasty