We are very familiar with the shadow, the sun lit the lamp or below can see the shadow of a person or object. Because these dark shadows, it is usually referred to as a shadow. The bright area outside the shadow, we often think that sun or light, in fact, it is the sun or a light bulb image projected shadow. Because of these brighter than the shadow of a shadow, I give them named "Yang shadow", or simply "Yang shadow." Yang is to illuminate the shadow image of the sun projected the moon and the Earth. So, comprising a male shadow shadow shadow and child. light
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