In 931, he served under Dương Đình Nghệ (the administrator of Zhou Cho Giao Chỉ) and quickly rose through the military ranks and government administration; by 934, he was promoted to the post of military governor of Ái Châu.
Pada tahun 931, ia bertugas di bawah Dương Đình Nghệ (administrator Zhou Cho Giao Chỉ) dan dengan cepat naik pangkat militer dan administrasi pemerintahan; pada tahun 934, ia dipromosikan ke jabatan gubernur militer Ái Châu.