Lei Siqi 雷思齐 — Daoist Scholar of the Yijing and Empty Mountain

Lei Siqi was born in 1231 in Linchuan — present-day Fuzhou, Jiangxi Province — a region with a long tradition of producing scholar-officials and literary figures. In childhood he studied Confucian classics, receiving the kind of rigorous classical education that formed the intellectual foundation of educated men in Song China. This Confucian grounding was not incidental to his later Daoist career; it was essential to it.

When he grew up, he became a Taoist priest and took up residence at Wushi Temple. The transition from Confucian student to Daoist priest was less unusual in Song China than it might appear: the intellectual culture of the period was deeply syncretic, and many of the most significant Daoist thinkers of the era had received thorough Confucian training before committing to Daoist practice. For Lei Siqi, the two traditions were not in tension but in dialogue — a dialogue that would define his scholarly output for the rest of his life.

The defining event of Lei Siqi's life was not a personal choice but a historical catastrophe: the fall of the Song Dynasty to the Mongol forces of Kublai Khan. For many Song loyalists, the dynastic transition was experienced as a moral crisis that demanded a response. Some collaborated with the new Yuan regime; others withdrew.

Lei Siqi withdrew. After the fall of the Song, he retreated into the empty mountains and lived in seclusion. His contemporaries recognized this withdrawal as a statement — not of despair but of integrity — and honored it with the name Kongshan Xiansheng (空山先生 — Mr. Empty Mountain). The name carried resonances that any educated person of the period would have recognized: the empty mountain as a space of clarity, simplicity, and genuine cultivation, in contrast to the compromised world of dynastic politics below.

Despite his withdrawal, Lei Siqi did not disappear entirely from public life. After Emperor Shizu of the Yuan Dynasty consolidated control over the Jiangnan region, he summoned Zhang Zongyan — the 36th Heavenly Master of the Zhengyi tradition — to take charge of Daoist affairs across all circuits of Jiangnan. Zhang Zongyan, recognizing Lei Siqi's exceptional learning, courteously invited him to serve as a lecturer on metaphysics and Daoist philosophy.

Lei Siqi accepted, and became famous for a time in this role. The arrangement was characteristic of the Yuan court's approach to Daoist institutions: rather than imposing a single administrative structure, the Mongol rulers worked through existing networks of respected figures, using the prestige of masters like Lei Siqi to legitimize their religious governance. For Lei Siqi, the role allowed him to teach and transmit his learning without abandoning the intellectual independence that his mountain retreat had represented.

In his later years, Lei Siqi lectured on Daoist learning at Guangxin Mountain, continuing his teaching role in a setting closer to the mountain seclusion he had always preferred. On his deathbed, he returned once more to Wushi Temple — the place where his Daoist life had begun — completing a circle that had taken him from temple to mountain to court and back again.

Lei Siqi's most enduring contribution was his scholarship. He read extensively in both Confucian and Daoist texts, and was particularly proficient in the study of the Yijing (易经 — Book of Changes) — the ancient Chinese classic of divination and cosmological philosophy that had been a touchstone for both Confucian and Daoist thinkers for centuries.

His major works include The Original Meaning of Laozi (老子本旨) — a commentary on the foundational text of Laozi's thought; The Essential Meaning of Zhuangzi (庄子本旨) — a commentary on the Zhuangzi; Five Volumes of The Book of Changes Diagrams: Comprehensive Transformations; Three Volumes of The Book of Changes Divination: Comprehensive Transformations; and Three Volumes of Poems in Imitation of Tao Yuanming.

Lei Siqi was gifted in literary creation and renowned for his poems and essays. He was on good terms with prominent scholars of his time, including Zeng Ziliang, Wu Cheng — one of the most important Confucian thinkers of the Yuan period — and Yuan Jue, a leading literary figure. These friendships placed Lei Siqi at the intersection of the Yuan dynasty's most significant intellectual currents, bridging Daoist scholarship and Neo-Confucian thought.

His disciples included Fu Xingzhen, Zhou Weihe, and Wu Quanjie — the last of whom would go on to become one of the most prominent Daoist figures of the early Yuan period, serving as a key administrator of Daoist affairs under the imperial court. The quality of Lei Siqi's disciples is itself a measure of his teaching: Wu Quanjie's subsequent prominence reflects the depth of the formation he received.

Lei Siqi's life presents a particular model of Daoist engagement with the world: not the ritual specialist, not the institutional administrator, not the hermit who severs all connection, but the scholar-priest who maintains his intellectual independence while remaining available to teach. His retreat to the empty mountain was not a rejection of the world but a refusal to be absorbed by it on its own terms.

The works he produced in that mountain seclusion — commentaries on the three great texts of the Daoist and Confucian traditions, Yijing studies of genuine depth, poems that placed him in the lineage of Tao Yuanming — were the fruit of that independence. They represent a form of Daoist contribution that is easy to overlook in histories focused on institutional development and ritual innovation: the contribution of sustained, rigorous thinking about what the tradition actually means.