1. Blind Box refers to the type of packaging that keeps the collectible toy as a mystery until it is opened. Blind boxes typically come in series that shows a collection; some figurines are rarer to find than others, these are referred to as "secret", "hidden" or "chase" figures.

       2. A whole box contains no-repeated figures. If there is a secret figure in the box,                  one basic figure will be randomly replaced by it.