Mahjong vuas, tseem hu ua "sparrow vuas," yog cov ntawv ua si siv hauv kev ua si ntawm Mahjong. Lawv cov qauv tsim los ntawm Ming Dynasty's "Ma Diao" vuas, uas tuaj yeem taug qab mus rau qhov kev hloov pauv ntawm Tang Dynasty's "Leaf Game." Tom qab hloov zuj zus los ntawm Ming Dynasty's Ma Diao cov vuas, Chen Yumen ntxiv cua thiab xub vuas nyob rau hauv lub lig Qing Dynasty, ua rau niaj hnub daim ntawv. Cov vuas muaj "pob xyoob, voj voog, thiab cim" thiab "sab hnub tuaj, sab qab teb, sab hnub poob, sab qaum teb, nruab nrab, ntsuab, thiab dawb." Cov vuas thaum ntxov feem ntau yog ua los ntawm xyoob thiab ntoo; cov pob txha pob txha tau tshwm sim thaum lub sijhawm koom pheej ntawm Tuam Tshoj; thiab cov vuas niaj hnub no feem ntau yog ua los ntawm cov yas.
Cov txheej txheem Mahjong muaj 136 cov vuas, nrog plaub ntawm txhua hom. Kev pov tseg ntawm cov khoom pov tseg kuj tau ua rau muaj kev txhawj xeeb ib puag ncig, ua rau kev tsim kho cov chaw pov tseg cov khoom pov tseg kom ua tiav cov khoom pov tseg.
