Huarong Dao is a very classic puzzle game. Together with Diamond Chess and Rubik's Cube, it is called "Three Incredibles in the Intellectual Game World" by foreign intelligence experts in the intellectual game industry. A global game on Huarong Road, different countries have different names, also known as, [Khun Phaen Puzzle] [Huarong Road], [Huarong Road], [15-puzzle], [Ma's Puzzle], [Box into り Niang], [ Klotski], 【Khun Phaen Escapes to Freedom】, 【L'âne rouge】, 【Pennant Puzzle】and so on.