In Chinese philosophy, the concept of yin yang is used to describe how polar or seemingly contrary forces are interconnected and interdependent in the natural world, and how they give rise to each other in turn. Opposites thus only exist in relation to each other. The Summer Rabbit and the Winter Rabbit coins are made in the shape of Yin and Yang, based on Chinese philosophy. Yin and Yang symbolise two opposite but complementary basic forces like summer and winter.

According to the Chinese Zodiac, the Year of 2011 is the Year of the Rabbit, which begins on February 3, 2011 and ends on January 22, 2012. The Rabbit is the fourth sign of the Chinese Zodiac, which consists of 12 animals signs. The Rabbit is a lucky sign. Rabbits are private individuals and a bit introverted. People born in the Year of the Rabbit are reasonably friendly individuals who enjoy the company of a group of good friends. They are good teachers, counselors and communicators, but also need their own space.