In the Yellow River Valley, of the earliest vassal states, the State of Cai was founded following a grant of land by the first Zhou King to his younger brother.
Di Lembah Sungai Kuning, dari negara-negara bawahan paling awal, Negara bagian Cai didirikan menyusul pemberian tanah oleh Raja Zhou pertama kepada adik laki-lakinya.