Fangzhu mirrors

Uses of the Reverted Elixir. The third part of the Scripture of the Golden Liquor concerns the uses of the Reverted Elixir. Placed on fire, it will form the Elixir-Gold (or Cinnabar Gold, danjin). This can be used for smearing the blades of swords that keep the other weapons ten thousand miles away (a phrase that also appears in the Nine Elixirs) or for casting dishes and cups. Those who eat and drink from these vessels can live as long as Heaven and Earth, for these vessels, like the fangzhu mirrors, absorb the essences of the sun and the moon. ... 

According to the commentary, these vessels are similar to the fangzhu mirrors that absorb the essences of the Sun. See above, p. 117. 

This is reminiscent of the method suggested by Li Shaojun to Emperor Wu of the Han see above. Chapter i. On eeping weapons away with an elixir see also Jiudan jingjue, 1.9b on the fangzhu mirrors see Baopu zi, 3.53 (trans. Ware, 62). 

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