Zung Jung is a modern, mathematically balanced ruleset for Mahjong created by Alan Kwan, a statistician and lifelong enthusiast of the game. Kwan loved Mahjong’s complexity but saw how many rule variations had drifted over time. Some offered generous payouts for random luck; others were weighed down by historical quirks, regional traditions, or overly technical scoring that confused newcomers. His goal was to design a version that felt fair, logical, and accessible—a framework that would let people from any background sit at the same table and compete on even terms.
The phrase Zung Jung (Cantonese: zung1 jung4) comes from a Confucian concept often translated as “the Middle Way.” It means harmony through balance—avoiding extremes and finding the right proportion between simplicity and depth. That philosophy runs through every part of the system: clear structure, consistent math, and enough flexibility to stay interesting after hundreds of plays.
Zung Jung can be considered a modernization of Hong Kong Mahjong and a simplification of Japanese Riichi Mahjong. Alan Kwan’s ambition for Zung Jung is to serve as a modern standard and the future of Mahjong. As the love child of Hong Kong Mahjong and Riichi Mahjong, Zung Jung is, in many ways, an evolution of the Hong Kong and Riichi Mahjong formulas, preserving the simplicity of Hong Kong Mahjong, the strategic depth of Riichi Mahjong, and the cultural spirit of both, while offering a clearer, standardized scoring system. Understanding Zung Jung this way provides helpful cultural context for the Chinese and Japanese diaspora, making the ruleset feel familiar, approachable, and grounded in both the Hong Kong and Riichi traditions.
A Ruleset Built on Clarity
At its core, Zung Jung replaces complicated fan multipliers with a straightforward additive point system. Instead of multiplying base scores, each completed pattern contributes a fixed value, and those values add together to form the total. This eliminates the “exponential chaos” that can make other versions unpredictable while still rewarding creative, high-skill hands. The result is a game where luck still matters, but good decision-making and pattern recognition shine through.
Because of this transparency, Zung Jung is one of the easiest modern variants to teach to new players. The structure is familiar—four sets and a pair—but the scoring logic feels cleaner. Players quickly learn to recognize how patterns interact and to understand why a particular hand earns its value. The system’s consistency also makes it ideal for clubs and teaching environments, where fairness and simplicity help everyone learn faster.
Why SDMC Chose Zung Jung
The San Diego Mahjong Club (SDMC) has adopted Zung Jung as its flagship format for exactly those reasons. The club’s mission is to bring people together through Mahjong, bridging differences in age, background, and prior experience. Zung Jung naturally supports that mission: its rules are clear enough for first-timers yet balanced enough to satisfy seasoned competitors.
Zung Jung captures the spirit of traditional Mahjong—tactical, social, and a little dramatic—while trimming away the inconsistencies that can frustrate learners. Zung Jung is both modern and respectful of tradition, making it the ideal foundation for the club’s teaching materials and events.
A Brief Competitive History
Zung Jung once served as the official ruleset of the World Series of Mahjong (WSOM), a major international tournament that drew players from across Asia, North America, and Europe. During those years it was sometimes referred to as “World Series Rules.” Although the WSOM eventually ended, its legacy continues wherever players use Zung Jung’s structure for organized play. Many competitive clubs around the world still rely on it for balanced scoring and smooth cross-regional communication.
Designed for Compatibility
Another strength of Zung Jung is that it works with nearly every standard Mahjong set—Chinese 144-tile sets, Japanese Riichi 136-tile sets, or even American Mahjong sets if the jokers are set aside. That universality makes it ideal for a club environment like SDMC, where members often bring their own sets from home. No matter the tile design or numbering style, the game plays the same.
Learn More
SDMC’s website has the full rules for Zung Jung Mahjong available of the Learn to Play page on this website. We also offer a handy cheat sheet for the format.
For players who want to explore the system in depth, Alan Kwan’s official website — www.zj-mahjong.info — contains the latest rule documents, detailed scoring charts, and essays on the mathematics and design philosophy behind Zung Jung.
A companion fan-made site, www.zungjungmahjong.com, offers tutorials, translated guides, and example hands that make the concepts even easier to grasp.
Whether you’re a lifelong Mahjong fan or a newcomer learning your first sequences and triplets, Zung Jung represents the “middle way” between simplicity and depth. It’s the perfect format for players who want a fair, thoughtful, and beautifully balanced version of the world’s most enduring tile game.