About the Zung Jung Movement
The Zung Jung Movement (ZJM) is a competitive infrastructure initiative launched by the San Diego Mahjong Club (SDMC) to advance, standardize, and expand organized mahjong competition.
ZJM is not a project only for Zung Jung players. It is a framework for mahjong players.
Mahjong is played in many traditions—Riichi, Hong Kong, Taiwanese, Filipino, and numerous house-rule systems—but competitive play is often fragmented across these variants. ZJM exists to create a shared competitive structure that allows mahjong clubs to host organized tournaments using a common standard.
ZJM formalizes a portable tournament architecture built on the Zung Jung Mahjong ruleset (v3.3) and the competitive foundation originally demonstrated by the World Series of Mahjong (WSoM). Its purpose is to transform a historically event-centered competitive model into a replicable, sanctionable system that any qualified club or organization can implement.
In this sense, ZJM represents the next stage in the evolution of Zung Jung Mahjong: moving from a single international tournament concept to distributed ecosystem of competitive events.
Historical Context
First Wave of Zung Jung
The first wave began with the creation of Zung Jung by Alan Kwan and the World Series of Mahjong, which introduced Zung Jung Mahjong as a balanced scoring system designed to support international competition between players from different mahjong traditions.
This phase demonstrated that a universal competitive format could work.
Second Wave of Zung Jung
From our perspective, the formation of the Zung Jung Movement marks the beginning of the Second Wave of Zung Jung. The second wave focuses on building the missing ecosystem.
Through the San Diego Mahjong Club and the Zung Jung Movement, the goal is to establish a standardized tournament framework that mahjong clubs around the world can adopt, allowing organized competition to grow beyond a single flagship event.
Building the Zung Jung Ecosystem
The mission of the Zung Jung Movement is to build and support the infrastructure necessary for Zung Jung Mahjong to grow as an organized, accessible, and competitive form of mahjong.
At the foundation of that ecosystem, ZJM establishes:
- A single competitive rules document
- A standardized penalty and arbitration framework
- A transparent sanctioning structure
- Event formats scalable from local tournaments to championship-level events
The objective is not to create multiple competing rule systems, but to define a consistent competitive universe with multiple event configurations centered on Zung Jung Mahjong. Players, clubs, organizers, developers, and independent projects can then operate within and build upon that common foundation.
Supporting the Zung Jung Community
ZJM does not believe that every project advancing Zung Jung needs to be created, owned, or controlled by the Movement itself. Instead, one of ZJM’s primary roles is to provide infrastructure and support for independent projects throughout the Zung Jung community.
A developer can build software. A local organizer can establish a club. Players can create educational resources. Others can contribute translations, tournament formats, research, tools, or entirely new projects.
ZJM’s role is to provide the standards, resources, visibility, interoperability, and shared infrastructure that allow these independent efforts to reinforce one another.
This support takes different forms throughout the ecosystem:
- For players, ZJM provides standardized rules, reference materials and cheat sheets, educational resources, and tools such as Mahjong Caddie for scoring, playing, and participating in the broader competitive ecosystem.
- For clubs and organizers, resources such as Club-in-a-Box, Mahjong Caddie, and Mahjong Boss provide infrastructure for establishing clubs, organizing games and competitions, managing events, and connecting local communities to the wider Zung Jung ecosystem.
- For developers and independent projects, ZJM can provide visibility and promotion through its website and community, helping useful Zung Jung software and other projects reach the people they were created to serve.
The Movement is Growing
One of ZJM’s early goals was to see the development of a modern, high-quality digital client dedicated to Zung Jung. That goal has now been realized from within the community.
Through the San Diego Mahjong Club, a member of the Zung Jung Movement created Red Dragon, a dedicated Zung Jung app providing a modern way to play the game digitally. Rather than being commissioned or developed by ZJM itself, Red Dragon emerged independently from a member of the community.
That is the model ZJM seeks to encourage.
The objective is not to centralize Zung Jung under a single organization. It is to make it easier for people who want to play, organize, develop, teach, compete, or otherwise contribute to actually do so.
A successful Zung Jung ecosystem should eventually be capable of producing new clubs, software, competitions, educational resources, and other projects independently. ZJM exists to provide the common foundation that helps those efforts succeed, connect with one another, and collectively move Zung Jung forward.
Structure
ZJM operates on a two-tier tournament model.
Type 1 Tournaments
Sanctioned as the Community Series of Mahjong (CSoM) and Series of Mahjong League (SoM League), these are club-scale tournament formats designed for accessibility and local adoption.
It is based on the WSoM tournament structure but has been modified to be logistically easier for local clubs to run.
Type 2 Tournaments
A longer-form event configuration designed for statistical robustness and elite competition.
This format preserves the same core rules and scoring logic, remains faithful to the competitive standard established by WSoM, and makes changes to facilitate portability.
Both formats operate under identical scoring, penalty, and arbitration standards.
Portability
ZJM defines portability as a tournament framework that is:
- Replicable by independent clubs
- Not dependent on a single venue, company, or organizer
- Governed by published standards
- Structured for consistent enforcement across events
ZJM is governance architecture, not a single tournament.
Governance Principles
- One ruleset
- Transparent procedures
- Published sanctioning criteria
- Clear dispute resolution pathways
- Version-controlled documentation
ZJM is designed to outlast individual events and organizers by prioritizing institutional clarity over personality-driven leadership.
Participation
The Zung Jung Movement invites mahjong clubs, tournament organizers, and competitive players to help build a shared competitive ecosystem.
Clubs may continue playing their preferred mahjong variants for regular sessions. When hosting organized competitions, the ZJM Competition Rules provide a standardized framework capable of bringing players from different mahjong traditions together.
The long-term goal is simple:
to create a competitive environment where mahjong players everywhere can compete under a common standard.