It is well known that Yijing symbolism was woven into alchemy. But Zhang Boduan's Wuzhen pian (an exposition of neidan in verse) also has numerical structures linked to that symbolism embedded within its structure. That presents opportunities to learn more about Daoist texts’ conveyance of meaning via esoteric symbolic interpretation. In addition, the commentator Yu Yan (1258–1314), perhaps inspired to combine jindan with Cheng–Zhu thought by Zhou Dunyi's Taijitu shuo (itself originating from the Daoist Chen Tuan) and possibly Tantric Buddhist dhāraṇī and maṇḍala, developed graphic illustrations (tu) of alchemical practice that influenced late-imperial Daoist works like the Xingming guizhi.

中文翻译：

---

诗圈

众所周知，《易经》的象征意义是融入炼金术的。但张伯端的《乌镇篇》（对内丹的诗文阐释）也有与嵌入在其结构中的象征意义相关联的数字结构。这提供了更多地了解道教文本通过深奥的符号解释传达意义的机会。此外，评论家于言（1258-1314）可能受到周敦颐的太极图说（本身源自道家陈团）和可能的密宗佛教dhāraṇī和maṇḍala的启发，将金丹与诚朱思想结合起来，开发了图形插图（tu ）影响了晚期道家著作的炼金术，如《行明桂枝》。