Spring Ox (春牛芒神) (春牛芒神)

The tongshu's annual figure computed from the Qing 春牛經 rules — twelve parts verified against the published 2025 description, the coat/belt table proven equal to its generative theorem, the ±5-day stance rule fed by the catalogue's own lichun and lunar engines, and the un-double-sourced sub-rules deferred by name.

Cost: 2 TIAN Points per call. tRPC procedure almanac.springOx.