It is a kind of card similar to colored paper. According to public information, the square card of the valley circle is similar to colored paper, but smaller and thinner, thicker and white than postcards. The signature board is hard-printed with the relevant contents of the role or work, and is accompanied by the signatures of the image creator, screenwriter, director, seiyuu or other creative members. Valley circle refers to people in the circle who are keen to buy millet. It is transliterated from the English word goods and generally refers to the periphery, including badges, cotton dolls, twisted eggs, pendants, stop signs and other forms.