Tools
Practical reference tools for classical formulas and meridians — for study, not prescribing.
Dose converter
Convert classical weights and volumes (Han / Song / Qing) into modern grams or millilitres.
Incompatibility
Check the classical “eighteen antagonisms” and “nineteen mutual restraints” between herbs.
Decoction guide
How to prepare a decoction — which herbs to pre-boil, wrap, or add late.
Meridian clock
The twelve two-hour periods and the meridian “on duty” in each (ziwu liuzhu).
Find herbs by meridian
Browse herbs by the meridian they enter (gui jing).