What is the way of playing mahjong in Germany?

The game "nanchang mahjong" is mainly popular in Nanchang, Jiangxi and its surrounding areas. In Nanchang, it is called nanchang mahjong. In other areas, it is also called "German Mahjong". Unlicensed mahjong tiles 136. The number of players is four, namely East, South, West and North, of which East is the dealer and the rest are neighbors. Each person holds 13 cards, and the cards in his hand are made according to the relevant card type conditions and cards by eating cards, touching cards and leverage cards. The biggest feature of nanchang mahjong is that three non-repetitive cards of the same kind can form a straight, and the introduction of a new type of "thirteen rotten cards" that is easier to reconcile than relying on nothing makes Hu cards easier; Moreover, due to the use of more mixed cards-"positive essence" and "deputy essence", the frequency of the appearance of Tianhu and Dihu has greatly increased.