When the cards are tied, the cards are composed of the four carvings of the east, south, west and north wind cards, which are called the Big Four. Circle wind engraving, door wind engraving, three wind engraving, bumping and bumping don't count.

Big Six is ??a variant of the national standard mahjong rules. Fan types are divided into twelve levels, with Fan 88 being the highest level. Big Four is one of the seven 88 card types.

88 Chapter

1. Big Four: a draw card composed of 4 pairs of wind carvings (kong). Not counting circle wind engraving, door wind engraving, three wind engraving, bump and bump sum.

2. Big Three Dollars: Among the winning cards, there are 3 pairs of white engraved pieces. Not counting arrow carvings.

3. Green one color: straight, engraved, and sum cards composed of 23468 and any cards in the word. Don't worry about mixing colors. If there is no tie tile composed of the word "Fa", you can count all the colors and break the unit.

4. Nine Lotus Lantern: A specific card type consisting of ①①①②③④⑤⑥⑦⑧⑨⑨⑨. Any 1 ordinal card of the same suit becomes a tie. Excluding all colors, it is named after listening to all 9 cards of the same suit when listening to cards. If it is not the case of hearing nine kinds of tiles but the card type behind the tile matches the Jiulian Baodeng tile type, it is generally not counted as the Nine Lotus Baodeng, but it can be counted in some cases (such as QQ Mahjong).

5. Four bars: 4 bars, because there are a total of 18 cards in a tie, also known as the "Eighteen Arhats".

6. Seven pairs in a row: a sum of seven ordinal pairs composed of ordinal cards of one suit. Don't care about one thing, don't ask for help, just fish alone.

7. Thirteen Units: A sum tile composed of 3 types of ordinal tiles, one and nine, 7 types of character tiles and a pair of generals. Regardless of the five gates, clearing in front of the gate, or fishing alone, you can make up for it by yourself without asking for help. Also known as "the unparalleled national scholar".

Reference: Baidu Encyclopedia - Big Four Happiness