Originating in what is now southern China and northern Vietnam, the Vietnamese people pushed southward over 2 millennia to occupy the entire eastern seacoast of the Indochinese Peninsula. Ethnic Vietnamese constitute about 90% of Vietnam's population. | Originating in what is now southern China and northern Vietnam, the Vietnamese people pushed southward over 2 millennia to occupy the entire eastern seacoast of the Indochinese Peninsula. Ethnic Vietnamese constitute about 90% of Vietnam's population. |