讀《南宋鹽榷——食鹽產銷與政府控制》時，意外得知當時的乳香交易亦屬税收要項，疑惑宋人用法為何，這才發現：原來不僅入藥，禮俗祀拜均需此物。
QOTO: Question Others to Teach Ourselves An inclusive, Academic Freedom, instance All cultures welcome. Hate speech and harassment strictly forbidden.
