Mathematicians use the sign "infinity" to express infinity, which is derived from the Latin infinitas, which means "no boundary".

In 1858, the German mathematician Mobius discovered that the paper tape loop made by twisting a piece of paper 180° and then bonding the two ends together has magical properties. The two-dimensional one-sided curved surface existing in the three-dimensional world is the famous Mobius ring.

Mobius ring is not only a classical model carrying the concept of infinity, but also looks like the symbol of infinity.

The Mobius ring is drawn on the back of the card in a minimalist way, twisting, rotating, reciprocating, cycling, interleaving, endless and infinite. Design details hide the designer's thinking and pursuit of time, space and cardistry effect.