Cổ Phúc
Cổ Phúc is a town and the capital of the Trấn Yên District of Yên Bái Province , in the northeastern region of Vietnam . 
<triplet> Cổ Phúc <subj> Trấn Yên District <obj> located in the administrative territorial entity <triplet> Trấn Yên District <subj> Yên Bái Province <obj> located in the administrative territorial entity <subj> Vietnam <obj> country <triplet> Yên Bái Province <subj> Vietnam <obj> country <triplet> northeastern <subj> Vietnam <obj> country <triplet> Vietnam <subj> Yên Bái Province <obj> contains administrative territorial entity