- Playing cards online or also called other names is gray - obnoxious. Mau binh is a popular folk game in all 3 regions of Vietnam, some people like to go to the south where people like it also have some people who like to play in the game, so we have more games. Play the above to the optional gamers. With a simple game rule, all players can play online on 2 - 4 people online. - With a beautiful interface, simple, easy to play, the game plays gently on most android versions and operating systems