• I Ching ⤓ .md 2026-07-13T062546.818 000000000000640
  **Origin.** Ancient divination text; attributed to King Wen and the Duke of Zhou (11th century BCE); commentaries by Confucius and later scholars. The oldest of the Chinese classics.
• Wu Xing ⤓ .md 2026-07-13T062546.818 000000000000640
  **Origin.** Zou Yan, 3rd century BCE; systematized during the Han dynasty; foundational to Chinese cosmology, medicine, and statecraft.
• Yin-Yang ⤓ .md 2026-07-13T062546.818 000000000000648
  **Origin.** Pre-dates textual sources; systematized in the I Ching and by Zou Yan (3rd century BCE); foundational to Chinese cosmology.