太平省
In 950, Dương Tam Kha forced Ngô Xương Văn to quell the rebellion in Thái Bình Province, but he turned his army to dethrone Dương Tam Kha. Although Dương Tam Kha dethroned his brother after the death of his father, Ngô Xương Văn spared, but degraded him to Duke of Chương Dương.