References & Further Reading

• Ma Yi Shen Xiang (Ma‑yi Divine Physiognomy) — classical anthology; many editions and commentaries.
• Liu Zhuang Xiang Fa, Iron Gate Knife and other Ming‑Qing manuals.
• Modern compilations, ethnographic notes, and academic discussions for context/corroboration.

References are provided for cultural study only. Schools and editions vary; cross‑check where possible.