黃帝八十一難經 [ㄏㄨㄤˊ ㄉㄧˋ ㄅㄚ ㄕˊ ㄧ ㄋㄢˊ ㄐㄧㄥ; huang2 di4 ba1 shi2 yi1 nan2 jing1] Yellow Emperor's canon of 81 difficult questions, medical text, c. first century AD ◄ ►