The tangram has a very long history. In the Qing Dynasty, there was a puzzle game whose idea derived from the Banquet Table Diagrams (Yanji Tu) of the Song Dynasty and Butterfly Table Diagrams (Dieji Tu) of the Ming Dynasty, capturing the wisdom of the ancients. From literati to businessmen, even the royal family, they all fell in love with this brain game, also known as the "Fifteen-Piece Tangram Puzzle."

As the name suggests, the...