18 arhat means to have four bars and one general in hand. When drawing cards, you must have 18 cards in your hand, which is extremely high, 18 arhat 188 times, plus four bars. But it's not infinite. Hu card contains any four groups of barbell cards, with 4*4= 16 cards behind the bar and two other cards, and there are * * * cards 18 cards behind the Hu card, so it is called "eighteen arhats".

In the national standard, mahjong is 88 times, and it is full in Japanese mahjong. It consists of four bars (both open bar and hidden bar) and a pair of finches' heads. In the earlier rules, only four thick bars were needed, and the cards could be combined without making a sparrow head. If the cards on the ridge that were touched just made a sparrow head, it would be twice full. Four thick sticks are also called eighteen arhats, because there are (4*4+2=) 18 cards when playing Hu cards.

Specific rules

Four bars, and there are four decks of bars in the card. Count the underhand, not the single fisherman. For the "four bars", many dark engravings can be counted, as follows:

1, four exposed bars, not counting. At this time, the self-touch is added to the "self-touch", and the point and the addition are "all asking for help".

2. When there is only one hidden bar, it is not counted.

3. When there are two hidden bars, add "double hidden engraving" (2 times).

4. When there are three hidden bars, add "three hidden engravings" (16 times).

5. When all four are hidden bars, add "four hidden engravings" (64 times). At this time, if you touch yourself, you can add "Dont Ask For Help".

Note: There is only one series of national standard bars (four bars, three bars, double hidden bars, double exposed bars, light and dark bars, hidden bars and exposed bars).