Case of Cai Xian's "Xianyu Xianxian Lu"

In 1767, during the Qianlong reign, the scholar Cai Xian, a provincial degree holder from Huating, Jiangsu, self-published his miscellaneous writings "Xianyu Xianxian Lu." Local gentry reported the work to authorities, alleging seditious content. The Qianlong Emperor personally reviewed the book and interpreted ambiguous poetic lines—such as "wind and rain follow their own whims, south and north hard to distinguish"—as veiled attacks on Qing rule and expressions of longing for the fallen Ming dynasty. Cai was arrested and charged with monumental treason. The case escalated into a major literary inquisition, with the emperor decreeing harsh punishment to deter dissent.

Cai Xian was sentenced to death by slow slicing (lingchi) for great treason. His son, Cai Biyu, was initially sentenced to death with reprieve but was later executed. Other male family members over sixteen were exiled as slaves to the frontier, while female relatives were enslaved. The block-engraver and several associates were also punished. The book was banned and all copies ordered destroyed.

Whether the obscure and innocuous literary phrases in Cai Xian's private writings constituted intentional sedition and veiled anti-Qing sentiment, or were merely forced interpretations to justify imperial censorship.

The case intensified the climate of fear under Qianlong's literary inquisition, signaling that even private, ambiguous writings could be fatal. It further stifled intellectual freedom among the literati, reinforcing self-censorship and ideological conformity. The prosecution without a clear seditious statement demonstrated the absolute and arbitrary power of imperial censorship, leaving a chilling legacy in Chinese legal and literary history.