Silla had this Goguryeo pay tribute to Japan by being accompanied with Silla's envoy, and in September 674, Anseung was given a title of King of Bodeok to establish a puppet regime there in order to demonstrate the suzerainty of Silla over former Goguryeo.
新羅の送使が随行する形でこの高句麗をして倭国へ朝貢させ、さらに674年9月には安勝を報徳国として再封し、旧高句麗に対する新羅の宗主権を誇示した。