Directives, pointers, or a jade guide to the truth.
The text was originally compiled during the late Ming Dynasty (1368-1644), with its earliest known woodblock edition printed in (the 43rd year of the Wanli reign). Its traditional authorship is attributed to an elusive master, 尹真人 (Yin Zhenren) , with compilation work possibly carried out by his disciples. The identity of "Yin Zhenren" (Immortal Yin) remains a mystery, adding an layer of intrigue to the classic.
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The original Ming-dynasty woodblock text is in the public domain. You can find scanned copies on: