He was born as the second son of Dinborin. He was crowned King 衛 in 978. In November 979, Dinborin was killed by Đ Théch, an eunuch, along with his eldest son, Zheng He, in a royal rebellion. Nguyen ̃ (̣̆ Ba ̃c), Rehoan, and others, who were Jeongseon's ministers, founded Jeongseon as the emperor. Rehoan took real power as 十 Do 將, regent, and vice king, and Jeongseon was actually a scarecrow. Đ ̂n, angered by Rehoan's tyranny, attacked Rehoan with a giant soldier, but was suppressed. In July 980, ahead of the Song Dynasty's invasion, Rehoan was crowned emperor by the crowd, and Dintoan was deposed and crowned King 衛, which led to the destruction of King Jeongjo.