Very well done on this one :D. All the melodies and choirdlines were incredbly soothing and fitted perfectly together. The arrangement is well thought through, and the mixing and eq'ing is decent.

One thing I want to pick on though, is that the sounding of the track is kinda dull. No reverb, no delay, no chorus, no sound effects. Personally I would definetly have put a weak delay on the Sine lead and some reverb on the piano. Also, I don't know if you've tried messing around with stereo separation that much , but it's a great tool for opening up your tracks more.
The percussion part could also need some work, as you only use a kick for the most part of the song. Try mixing some claps and hats in there as well.

Overall, a well made song. You got all the difficult parts like the composition and the arrangement down, but you should work on those small details that take your music to the next level.

-Ectisity
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I like it. It could fit dancing, or perhaps be used as a video game track. (I know, my weird opinion.) It was a little too loud though, but maybe that's just my headphones.

Cool melodies with sweet harmonies
Nice key changes
0:57, 4:32 - the most catchy parts, I think, last one has a bit funny chinese taste
Overall song sounds like several compositions merged into one with smooth transitions.