Lu Shu 陆墅 — Southern School Alchemist and Commentator on the Wuzhen Pian

Lu Shu was a successor of the Yin-Yang alchemy tradition (阴阳丹法) of the Southern School — one of the two main branches of inner alchemical practice that developed within the Southern School after its founding by Zhang Boduan. The Yin-Yang tradition understood the cultivation of the Golden Elixir as a process involving the interaction of complementary male and female energies — the yin and yang principles that the Yijing and the Daoist cosmological tradition understood as the two fundamental forces of the universe.

This tradition stood in contrast to the "pure cultivation" (清修) approach that other Southern School practitioners advocated — an approach that emphasized solitary inner cultivation without the involvement of a partner. The Yin-Yang tradition held that the interaction of complementary energies was essential to the alchemical process, and that the cultivation of the Golden Elixir required the harmonization of these energies in a specific and carefully regulated way. Lu Shu's identification as a successor of this tradition placed him within one of the most distinctive and debated currents of Song-period Daoist practice.

The Wuzhen Pian (惟真篇 — Awakening to Reality) was composed by Zhang Boduan in 1075 CE and is universally recognized as the foundational text of the Southern School and one of the greatest poems in the Daoist tradition. Written in a combination of regulated verse forms — including lushi (regulated verse), jueju (quatrains), and ci (song lyrics) — the Wuzhen Pian expressed the essential teachings of inner alchemy in a form of extraordinary poetic beauty.

By the Southern Song period, the Wuzhen Pian had already attracted multiple commentaries, each reflecting the commentator's own understanding of the inner alchemical tradition. Lu Shu's commentary — written from the perspective of the Yin-Yang alchemy tradition — offered a distinctive interpretation that reflected his specific lineage and its approach to the text's teachings.

Lu Shu's Annotations on the Wuzhen Pian by the True Person Ziyang ("True Person Ziyang" being Zhang Boduan's honorific title) was transmitted and circulated widely in his era. The fact of its circulation indicates that it was received as a valuable contribution to the understanding of the Wuzhen Pian — that practitioners and scholars found in Lu Shu's Yin-Yang alchemy perspective something that other commentaries had not provided.

The commentary's circulation also reflects the broader vitality of the Southern School tradition in the Song period: a tradition that was actively producing new interpretations of its foundational texts, debating the meaning of its core teachings, and transmitting its understanding through a network of practitioners and institutions that extended across the Chinese world. Lu Shu was one of the figures who kept this tradition alive and developing — a commentator whose work contributed to the ongoing conversation about what the Wuzhen Pian meant and how its teachings should be practiced.