In ancient China, there were four major strata: the sergeant, the peasants, the workers and the merchants. They were the cornerstones of the whole society, created the prosperity of the society and promoted the process of the history of Chinese civilization.

Four big strata is based on these four classes as the basis of the core, derived from the mild strategy to develop the game, players in the game to operate their own civilization, to balanced and prudent development and maintenance of their own four classes, because in the end of the game, the lowest class score, will be the score of the player.

Players get a card each round by bidding, and the card is placed in one of the four strata, producing the effect of this stratum, such as farmers produce food, merchants produce money, sergeants property rights, workers provide technology bonuses, which are then maintained and paid, consuming the corresponding food and money. At the end of the game, the score is decided by the total score of the lowest class, so we must maintain their civilized needs in the game process on the one hand, on the other hand, try to balance the development.