This is the first time I work with Masking so everything did not go well as I want.
Firstly, the light in the middle top and left bottom of the image is not bright enough as I intend to do. I didn't know how to make it become dazzling.
Then, I could not make the cellist stand out from the background.
Next, the flower seemed quite hard compare to the others ...
And so many mistakes I got when using mask the first time ...

This Photo was taken by my friend - Nguyen who now studies in Germany. He took this pic from his window in the dormitory.
I really like it due to its use of contrast colors and the rule of the third. Actually, the rule of the third was not used perfectly in the original photo, but then I use Photoshop to cut sky.