《太平广记·卷四百二十七·虎二》
开元年末，渝州多次发生老虎吃人的事，设了有机关的陷阱，总也没有捉到它。
开元末，渝州多虎暴。设机阱，恒未得之。
In the final years of the Kaiyuan era, there were many cases of tigers eating people in Yuzhou. Traps with mechanisms were set up, but the tiger was never caught.