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The holes in the top of windows are arranged in the way as holes of flute.
The switches in the sides control the open and close of holes.
When the wind blow the holes in the window,
they will produce enjoyable melodies according to the direction and strength of wind.
People won't be afraid of the voice caused by wind blowing the window.
People also can put their fingertips on the holes to perform music they like.
This design can promote the interactions among products, people, and nature.
liyuan liu lei shi sunqing yan