Song Kang's butterfly tattoo is an interesting tattoo choice for the young Korean actor. Song Kang has been seen wearing a tattoo of a butterfly on the left side of his neck, and fans are wondering what it stands for. The butterfly is a symbol of transformation and growth, and it's a beautiful symbol for Song Kang to choose for his body art. It could also represent his journey from being an unknown actor to becoming a rising star in the K-Drama world.