The cards consisting of East, South, West, North, China, France, White, 10,000, 90,000, one cake, nine cakes, chicken and nine pieces, plus any one of the above 13 cards, are thirteen orphans.

Three or four cards in the middle, three cards in the middle and four cards in white are called big three yuan.

A card with three or four cards in the east, south, west and north is called Dasixi. In the east, south, west and north, one of the cards is called Xiao Sixi, among which (2 cards) are still three or more cards.

/mygames/cardgames/tdh/rule/