Crown Prince Uiso (Korean: 의소세자; Hanja: 懿昭世子; 27 September 1750 - 17 April 1752) or Crown Prince Successor Uiso (Korean: 의소세손; Hanja: 懿昭世孫), personal name Yi Jeong (Korean: 이정; Hanja: 李琔) was a Joseon Crown Prince as the son of Crown Prince Sado and Crown Princess Consort Hyegyeong and was third in line of succession to the throne to King Yeongjo. He was the older brother of King Jeongjo. His Chinese name was Changheung (Korean: 창흥; Hanja: 昌興; RR: Changheung; MR: J'anghŭng).