Thank you for your reply FiFJungle, yes there is dozens of same kind of tracks and I’m not such a fan of 4 chords songs but when the track is rejected they suggests me to check the best seller tracks and also when I check the new submitted tracks they are also sounds quite the same. Maybe I should find a middle way that not so far from Audiojungle sound but in the meantime not exactly the same with other tracks and has some originality.
And thank you for your reply AlisterBunclark, it’s a very helpful comment. Yes the side chain makes the piano unnatural. I will try to make changes on Mix with your suggestions and re-submit.
Sorry for my English,
Thank you all!