The sky and the earth are all dark. Suddenly, the summer day sees the light, like a campfire in the night, burning like a raging fire, and the light shines around.

Even in summer, he feels warm and incomparable, as if he feels very comfortable with all his heart and soul. If he has an understanding in his heart, this is "Yang".

In a few moments, the sky and the earth seem to be darker again, as if there is an invisible dark force, gradually shrouding the flame, a trace of cold breath, but also let the summer can not help shaking.

Summer Chen knows that this is Yin.

Since...