Beijing people trains the pigeons to fly in certain orbit. You have to raise a rod from the left, So the pigeons could turn right. At some certain point, when you raise the rod from right, And It will go to the left.<br />The Beijing locals not only love training pigeons , but also love to make the pigeon whistle, the whistle stitches on the pigeons , thus when they fly, we could hear the sound in the air, just like a like of music . <br />https://goo.gl/EXMt3Z
