chinese drama soundtrack

[looma]

i cant help but be moved by some of the music and soundtracks in some of the dramas i watched,
does any one know if they sell the soundtracks<and if so where to get them from?
maybe a mainland products or a website that someone might know.
especially for Da Ren Wo,The Four and Love at first sight just to name some.
this is quite normal when it comes to Jdramas and anime and i hope its the same for chinese drama.
any help,info or honest opinion is greatly appreciated.
thanks