QUOTE(Wujiang @ Jan 9 2007, 04:35 AM) [snapback]4870809[/snapback]
No. China is not like japan where you can actually put things in like managable boxes like that. The sword variety are so vast, no one including myself can confidently say we have them all listed out. The only 'main' sword type would be the yaodao/peidao. There are those who use the avaliable data and draw gross generalized conclusions and market them as 'historical truths'. Because of the effects of the cultural revolution, we can't say with certainty that the conclusions we draw are truely sound because what we actually processing are but scraps and shadows of what there once was. Major gaps of critical primary materials is lacking for us to draw a strong case. The difference between many of the so called 'experts' and myself is that I acknowledge that due to the awfully limited amount of primary sources (relative to such a vast empire), there is actually a great deal of educated guesswork involved.
And I would like to point out that from my own finding, it is the liuyedao that was never used in the military.
AHH, sorry, did I say Yanlingdao ? No, that isn't a Yanlingdao. I suspect it is a piandao.
I can recall from the top of my head that there is actually mentioned briefly somewhere that the Yanlingdao have been around since the Song dynasty. I just can't remember where it was from.
I am buffled as there are almost no sources in Chinese for 1650-s, when the first clashes between Russians and Manchus occured in the valley of Amur.

I had a modern Chinese account of one of the most significant battles of this period (24.03.1652 by Julian calendar) near Achansk fortress. It is based completely upon Russian documents of XVII century. So it made me sad.
But I hope a lot of unique documents are in the First Chinese Archive Foundation (according to the modern Chinese materials, there are several millions of Qing era docs which are not even sorted by themes).
Then according to the Philip Tom and Scott Roddel, liuyedao substituted yanmaodao in the midst of XVIII. Niuweidao is unofficial weapon of rebels, but liuyedao is quite official issue (see Seven Stars site for beautiful sample of a liuyedao which belonged to a Qing officer in XVIII).
And regarding the piandao - does this degree of curvativeness exceed the curvature of liuyedao?
Could you attach an image of Yanlingdao?