ZIWEI
纳音五行局
NaYin Five Elements Bureau
中文通俗释义
紫微斗数依命宫干支纳音五行定出的起运局数（水二局至火六局），决定大限起运岁数与星系骨架。
English Plain Explanation
The tonal bureau (Water 2 through Fire 6) that sets the starting age for ten-year luck cycles and star placement.
Western Astrology Cultural Bridge
Resonates with the foundational house system cusp calculation (such as Placidus or Whole Sign) in Western natal astrology.