Now many of the old children's games are no more. Health training games such as sparring, skillful hands training such as marbles, unique, training for sharp eyes as fast as spreading boundaries, passing great, all are no longer played. As for how to play, surely no other children know. Fortunately only in a few remote rural areas. Among those games, there is a game of mind training that is no longer available, which is the game of ombudsman which was very popular in the rural areas. Until now, the game has not been discussed by any sociologist… Fortunately, this game was included in the famous silk painting of the same name by painter Nguyen Phan Chanh, so everyone still knows and remembers.

To play the game, the children had to dig on the ground two rows of parallel giants, each side having 5 giants and 5 fields. The other two ends are two big giants that are two squares. The number of pebbles in the square is 10, the field is 5. To win the right to go first, you have to play rock-paper-scissors to see who wins. When it's their turn, people pick up pebbles from small squares and spread them around in a clockwise direction. If all are scattered, pick up the gravel in the next square. Until you create a giant with no pellets, you can eat all the pieces of the square away.

The smart child who knows how to calculate and choose the square to take the piece, the first cup to get the square is the winner. Wu Quan always has a large number of troops. Such a gameplay seems to last forever because it is not easy to create an empty box in front of the quan. Besides, the number of pieces in all the squares adds up to 70, which is not a few. However, it only takes a few tens of minutes, sometimes ten minutes to end the game if you know how to calculate and choose the field to store your troops.

In this game, when eating the mandarin at the end of the game, all the children will know the sentence: run out of mandarins - remnants of people - collect troops - sell fields and re-arrange the game. Looking back, the game is quite similar to a social story. A society when the bureaucracy is scattered, the people die, it is time to stop the game to set another game. Obviously, the game is not just entertainment or calculation training, but also a social story, a warning contained in the game with the rules of each journey.