Liú Jĭn ( 28 February, 1451– 25 August, 1510 ) was a well-known Chinese eunuch during the reign of the Chinese Ming Dynasty Zhengde Emperor (r. 24 January 1506 – 20 April, 1521). Liu was famous for being one of the most corrupt officials in Chinese history and the emperor in all but name for some time. He was the leader of the "Eight Tigers", a powerful group of eunuchs who controlled the imperial court. Liu Chin is from the area of Xingping, a county in Shaanxi province, approximately 30 miles west of Xian prefecture. A son of Tan (談) lineage, when he was made a eunuch under the aegis of a eunuch official named Liu, he appropriated that surname.