Funny you should mention this!
I too had just looked this up recently, having forgotten that I myself had apparently engaged in a thread about this 10 years ago. There's actually some decent info in there, in fact a very good last post -- and all sorts of embarrassing ten-year-old conversations to blackmail
each other with
In terms of accuracy of info, it gets better as the thread goes on. viewtopic.php?f=5&t=17857
My two cents is that looking at ancient Chinese art is a good way to judge. The last post there has some comparisons of facial hair. While not all Asian men have a lot of facial hair, it's simply untrue to say that none
do or did. Just google image search "Chinese man beard." That's not to brush aside any intermarriage that has occurred since almost 2000 years ago and the influence that would have on modern day Chinese facial hair, but . . . Chinese men with beards that look like the art! Most of the art from the Han Dynasty has the wispy mustache or goatee going on, but there's also some creativity. I've heard somewhere that even though the "no hair-cutting" rule applied to head-hair after your capping ceremony, that facial hair was considered okay to style-shave because it grew after puberty. As is noted in the last post of the thread above, Qin Shi Huang Di's soldiers had styled facial hair. Granted, that was before state-sponsored Confucianism. Of course, shaving ALL your hair off would be considered un-manly. Also, women shaved their eyebrows off and painted them in, so the "all hair is sacred!" thing might have been a little more selective than we think.