unreliable; incredible

Ningpo figwort (Scrophularia ningpoensis); root of Ningpo figwort (used in TCM)

mythical fairyland on Kunlun Mountain 崑崙|昆仑[Kun1 lun2]

Xuanzang (602-664), Tang dynasty Buddhist monk and translator who traveled to India 629-645

abstruse; profound mystery; the mysteries of the universe

Huan Xuan (369-404), general involved in the break-up of Eastern Jin

profundity; depth

Zheng Xuan (127-200), late Han scholar

mystery within a mystery; the mysteries of the Dao according to Laozi 老子[Lao3 zi3]