Together with the Suwen, the Lingshu forms the Huangdi Neijing.
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history
Compiled around the 1st century BCE during the Western Han. Together with 《素问》 (Basic Questions), it makes up 《黄帝内经》 (Yellow Emperor's Inner Canon). The 灵枢 (Spiritual Pivot) half focuses on acupuncture — channels, points and needling techniques.