Mahjong comes from China, yet belongs to the whole world. Owing to its comprehensive cultural content as well as its merits of being interesting, competitive, and helpful to wisdom and friendship, it has been an enjoyable pastime for people all over the world for nearly a century. In order to expand, develop the Olympic spirit, and advocate a healthy, scientific and friendly Mahjong culture, to improve the communication and development of the Competitive Mahjong Game, and with the participation of Mahjong all over the world, we present "iTW Mahjong 16" android online game.