I directed and also draw this Illustration.
The concept of this work is based on "Yin-Yang and The five elements" （of Chinese philosophy ―fire, water, wood, metal, and earth)

The moon and flower symbolize women's body and deeply related with them.

so I placed them together.

The lily colored by five colors means the five elements.

And the phases of the moon is  related closely with women's body.

About "Yin-Yang",the moon means "Yin",and the lily means "Yan"and represent the eternal beauty.