sentences:  Fearing Ngô Quyền, Công Tiễn requested help from the Southern Han.Thenceforth, the emperor of the Southern Han, Liu Yan, took his chance and prepared to invade Tĩnh Hải (the Peaceful Sea) again.Liu Yan claimed that if Dương Đình Nghệ was dead, then Tỉnh Hãi Quân would be deprived of good generals.