1. found out that foreigner board doen't support marquee tag, but it works on free board(I just test it), is there difference between the two boards?

There are some limitations set for foreigner board....
I don't know why, but the webmaster setup the foreigner board with more html tag restrictions...  I'll ask the webmaster if they can modify the foreigner board html setting...

2.Junsang(YJ) cried a lot in this drama, is it common for Korean man? I mean boys are not allowed to cry easily in Chinese society, how about Korea?

Originally, Korean male were similar to Chinese society...
But in recent few years, a lot has changed...
There are a lot of women screenplay writers for TV, and men started to show more emotion in the dramas...  Soon, this became a norm...  Tough and handsome men cry on TV, so other men, especially younger viewers, start to think that it is okay to cry if they want to...  This is a good thing, because more women start to think that it is okay for a man to cry, also...  Overall culture changed with growing feminism and more open-minded thinkers...  It isn't just TV, but fashion, and other cultural changes occured at the same time that allowed men to be more expressive...

Some Korean males still think that men shouldn't cry...mostly older men...