Imagine trying to solve a dangerous crocodile problem not with hunters or traps, but with a strongly worded letter…
That was the extraordinary approach taken in AD 819 by Han Yu, one of China's greatest writers and a senior official of the Tang dynasty.
Newly appointed to govern Chaozhou in southern China, Han found himself confronted by a very real wildlife conflict.
Large crocodiles inhabited the Han River and surrounding waterways, where contemporary accounts describe them attacking livestock and, on occasion, people. Rather than declaring war on the reptiles, Han chose diplomacy – albeit diplomacy backed by divine authority.
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The remarkable episode survives because Han recorded it himself in his famous Memorial to the Crocodile (Jì Èyú Wén). After arranging for the sacrifice of a pig and a goat, he addressed the crocodiles as though they were capable of understandingan official government proclamation. "The Governor has come," he announced, before ordering the reptiles to leave the district. If they recognised the authority of the Son of Heaven, he declared, they should withdraw into the sea. If not, "within seven days" they would face the consequences of defying imperial authority.
According to later tradition, a violent storm swept through the region shortly afterwards and the crocodiles disappeared, cementing Han Yu's reputation as the official who banished the beasts by force of rhetoric alone. Han himself, however, makes no such claim. His essay ends with the proclamation rather than the outcome, leaving later generations to embellish the story.
The reality was more complex. Chaozhou's rivers were gradually reshaped by flood-control projects, agriculture and expanding settlement, reducing suitable crocodile habitat over the following centuries.
Large native crocodilians eventually disappeared from southern China, not because they had been persuaded to leave, but because people steadily transformed the landscape it depended upon. Even so, Han's unusual response reflects an important aspect of traditional Chinese thought: the belief that harmony between people, government and the natural world could be restored through moral authority as well as practical action.
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Modern science has given the story an unexpected epilogue. In 2022, palaeontologists formally named an extinct crocodilian species Hanyusuchus sinensis in Han Yu's honour. Fossil evidence suggests the animal could reach around six metres (20 feet) in length and survived in southern China until surprisingly recent times, overlapping with human communities. The researchers argued that historical accounts such as Han Yu's may preserve genuine memories of encounters with these formidable reptiles.
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Han's crocodile proclamation was not the only occasion in history when humans attempted to negotiate with wild animals rather than simply destroy them. Medieval European church courts famously summoned weevils, caterpillars and locusts before ecclesiastical judges, and ordered them to leave cultivated land. Across cultures separated by thousands of miles, people confronted troublesome wildlife not only with weapons, but with ceremony, law and surprisingly sophisticated ideas about humanity's place in nature.
Whether or not the crocodiles ever obeyed Han Yu's command, his proclamation remains one of history's most memorable attempts to resolve conflict between people and predators. More than 12 centuries later, it continues to fascinate – not because it proves words can tame crocodiles, but because it captures a world in which the boundaries between government, nature and belief were far less rigid than they seem today.
