In 951, he began challenging the royal authority of the ruling Ngô family. Two king Ngô Xương Ngập and Ngô Xương Văn sent a force tried suppressing Bộ Lĩnh that failed but captured Đinh Bộ Lĩnh's son, Đinh Liễn as a hostage. The two kings suspended Lien from a pole in plain view of Bộ Lĩnh and shouted that he would be killed unless Bộ Lĩnh submitted. Bộ Lĩnh angrily replied, "How can a great man compromise a great affair simply because of his son?" Bộ Lĩnh ordered more than ten arrows shot in Liễn’s direction. The two kings were horrified and withdrew their troops.