Mahjong attracts claims the way a rack attracts dust. Some are harmless; several are repeated by reputable publications and are simply wrong. Here are six, with what the record actually supports.
1. "Mahjong is a UNESCO intangible cultural heritage item"
It is not, and this one is easy to check.
China's Ministry of Culture, responding in November 2012, stated that no national-level intangible cultural heritage application for mahjong had ever been received and that mahjong is not a national ICH item. The various petition campaigns — including a widely publicised 2012 drive to gather a million signatures — were private and commercial initiatives, not state applications.
What is true: mahjong's competitive form is on a provincial heritage list in Tianjin, where it was listed in 2009 and where Sheng Qi, one of the principal drafters of the 1998 rulebook, was named a representative inheritor in 2011. That is a real and specific honour. It is not UNESCO.
2. "In 1998 China made mahjong its 255th official sport"
This is one of the most repeated facts in English-language writing about mahjong, and the evidence runs against it.
What happened in 1998 is not in dispute: a rulebook was drafted and approved. Whether that placed mahjong in the state's official sport catalogue is another matter, and official answers say it did not:
- The General Administration of Sport's mass sports department told China Economic Net in November 2012 that mahjong competitions had never been included in the national competitive sport programme.
- The Fujian Provincial Sports Bureau stated in an official reply dated 29 August 2022 that no mahjong event appears in the catalogue of events published by the General Administration of Sport.
- The Chengdu Sports Bureau said in August 2023 that mahjong is not among the 99 events in the relevant catalogue.
The accurate sentence is: a rulebook was issued; mahjong was never entered into the state's official sport catalogue.
The genuinely verifiable sporting milestone is different and more recent: mahjong's admission to the International Mind Sports Association in April 2017, via the Mahjong International League, as the sixth recognised international mind sport.
3. "Someone famous said mahjong is not gambling"
People say this constantly and usually attach it to a grandparent, a philosopher, or Mao Zedong. The citable version is duller and better:
"Mahjong has no necessary connection with gambling… the blame lies not with mahjong itself."Foreword, Mahjong Competition Rules of China (Trial), 1998.
Attributing it to an institution rather than a celebrated individual costs you a good story and gains you a fact.
A separate and much-quoted line — that Mao called mahjong one of China's three great gifts to the world — appears in a 2011 China Daily piece with no primary text behind it. We do not use it.
4. "Japanese mahjong uses flowers and seasons"
It does not. A riichi set is 136 tiles: 108 suited, 28 honours, and nothing else. No flowers, no seasons, no replacement draws.
This one matters practically, because players switching from Hong Kong or Chinese rules to riichi waste real time looking for bonus tiles that are not in the set. If you are moving the other way — from riichi to the American game — the corresponding trap is assuming flowers are bonus tiles. They are not. In the American game flowers are ordinary tiles that satisfy the "F" printed on the card, and there is no automatic replacement draw.
5. "A self-pick and a discard-win pay the same in American mahjong"
No, and the difference is the largest single lever in the scoring.
- Self-pick (you drew the winning tile off the wall): all three other players pay you double the card value.
- Off a discard: the player who discarded it pays double, the other two pay single.
- No jokers in the winning hand: doubles again under official NMJL rules, except on Singles-and-Pairs hands. The two multipliers stack.
A 25-point hand is worth 150 as a self-pick, or 100 off a discard — and 300 if it is both self-picked and jokerless. If you have been calling every winning discard out of habit, you have been leaving a third of your income on the table.
6. "Jokers can be used anywhere in a hand"
They cannot, and this is the most common illegal play in the American game.
A joker may complete any pung, kong, quint or sextet. It may never be used in a pair or as a single tile — and that includes the visually grouped "singles" that appear on the card as 2025, NEWS, 2468 or 369. Those look like groups and are printed close together for visual tidiness; every tile in them must be natural.
The exception is narrow and worth knowing: a pung or kong of flowers may contain jokers, because that is a group of three or more. A pair of flowers may not.
Why we bother
Two reasons. The first is that a guide which repeats comfortable errors is not a guide. The second is more practical: every one of these myths has a rule attached, and the rule is more interesting than the myth. The real story — a 1998 trial rulebook, a provincial heritage listing, a mind-sport admission in 2017 — is stranger and more specific than the version that circulates.