woman single : Spain (gold medal)
woman double : Japan (gold medal)
mix double : Indonesia (gold medal)
man double : China (gold medal)
and for man single is for Malaysia (gold medal) and maybe this is the first Malaysia get gold medal on olimpic
if this is become true good for badminton for more popular
LEE Chong Wei is the favorite to win he is very experienced in several international tournaments LEE Chong Wei is currently ranked first in the BWF World Rankings ( Men's Singles ) whilst CHEN Long opponent in 2nd place http://www.bwfbadminton.org/page.aspx?id=14955
So I agree LEE Chong Wei of Malaysia will get gold medal.