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This is the seal of Jiutian Xuannü, as depicted in the work <i>Lingbao Liuding Mifa</i> (靈寶六丁秘法) (Liu 2016). The author and date of the work are unknown, but "internal evidence points to a compilation date in the Northern Song period (960-1127)" (Gesterkamp 2017).</div>
<p><i>Lingbao Liuding Mifa</i> (靈寶六丁秘法)
</p>
Reproduced in:<br> Liu, Peng (2016). "Conceal my Body so that I can Protect the State": The Making of the Mysterious Woman in Daoism and Water Margin. <i>Ming Studies</i> 74. doi:10.1080/0147037X.2016.1228876