沽源县

沽源县	Gū yuán Xiàn	Guyuan, a county in Zhangjiakou City 张家口市, Hebei
沽	Gū	abbr. for Tianjin 天津 (also 津沽)
沽	gū	to buy / to sell
沽源	Gū yuán	see 沽源县
源	yuán	root / source / origin
县	xiàn	county