Cheng-hua: Year 20, Month 6, Day 20
12 Jul 1484
Li Yu, a censor-in-chief of the right and Tu Yong, a vice censor-in-chief of the right, were pardoned their crimes. Yu was transferred to Nan-jing, while the Censor Yu Bi was sent to the Embroidered-Uniform Guard prison. Previously, Zhang Jin, a deputy in the Messenger Office was sent to the Censorate for having made an arbitrary enfeoffment while on duty as an Imperial envoy. From the prison, he sent family members on several occasions to state that he had suffered an injustice. It was ordered that he remain imprisoned in accordance with the law and that, on the arrival of the envoy from the country of Champa, and his memorialized report, punishment would be arranged. At this time, the envoy from Champa arrived and Jin again sent family members to advise of his grievance. An Imperial order was issued noting: "Jin is in prison. How can he know of matters outside? It must be a circuit censor who has leaked word. Li Yu and so on are to carefully investigate and advise, and Jin is to be shifted to the Embroidered-Uniform Guard prison." At this time, Yu and so on submitted an impeachment against the Censor Yu Bi and the officers guarding the prison, and memorialized admitting their own guilt. The Emperor felt that, as Yu and Yong had been unable to strictly enforce security in their penal supervision duties, leading to a prisoner being able to know of outside events and submit a plaint, it was appropriate that they be prosecuted. However, as they admitted their guilt, they were leniently pardoned. Yu was transferred to Nan-jing, while Bi and the others were sent to the Embroidered-Uniform Guard, to answer charges together with Jin. Not long after, Bi was pardoned.
Zhong-yang Yan-jiu yuan Ming Shi-lu, volume 49, page 4281