yea, just a typo... i mean to say they stand sideway... thanks for the correction
Sanshou/Sanda started around a little bit before the cultural revolution, as I recall. It's pretty much their version of Gracie's challenge... People of different styles come together on a platform, called "lei tai" and beat each other up.
As the Communist took over, all forms of martial arts were forbidden. Then somehow, the government allows it again.
So now, in wushu (literally meaning martial art) competition, there are 2 categories: tao lu (which is them showing off their forms/patterns) and sanshou/sanda.
At first, it was called sanda. san=free, da=fight. But its name was changed since it has such brutal and violent name, so they change the name to sanshou. shou=hand.
The reason it looks so different from other chinese style, is because now, in China, most fighters in sanshou are athletes first.... So they're recruited by the government, and the government hire different coaches and come up with a very specific training doctrine. While other styles of chinese martial arts have been passed down by family, traditions
Hope that helps