李聖宗
In 1054, prince Lý Nhật Tôn ascended the throne as Lý Thánh Tông. Under the reign of Thánh Tông, Thường Kiệt rose to the rank of Bổng hành quân Hiệu úy, a high-ranking martial officer. He often accompanied and advised the emperor. Because of his performance, he was promoted to Kiểm hiệu Thái bảo.