 A boy student was given money in exchange for becoming a eunuch by Tran Canh in 1254 since many men castrated themselves to become eunuchs during the Tran and Ly dynasties.The Trần Dynasty sent Vietnamese boy eunuchs as tribute to Ming dynasty China several times, in 1383, 1384 and 1385 Nguyen Dao, Nguyen Toan, Tru Ca, and Ngo Tin were among several Vietnamese eunuchs sent to China.During the Fourth Chinese domination of Vietnam, the Ming Chinese under the Yongle Emperor castrated many young Vietnamese boys, choosing them for their handsomeness and ability, and brought them to Nanjing to serve as eunuchs.