Hello sifu hope can get some help

if i buy the below selecting "白色冰蓝光青轴+活动键帽" what actually i will get?
http://item.taobao.com/item.htm?spm=a230r....&id=18983529456

here is what i got so far (hope im right).
-White keyboard, but i dont know what default keycap i get. is it the pink one?
-blue switch
-what is this 活动键帽? Cant find anywhere
-is there free keycap or i need select one with "二色键帽"?

i translated and translated and guess and guess for days already.

Thank you yes it is the link. What is modifier keycaps? should i get free double shot instead