Where is the highest concentration of the Kinh population located ?
Kinh Dương Vương ( Hán tự : 涇陽王 ; " King of Kinh Dương " ) is a legendary ancient Vietnamese figure who was the first Hùng Vương ( King Hùng ) , mentioned in the 15th - century work Đại Việt sử ký toàn thư with having grouped all the vassal states within his territory into a unified nation , and as the founder of the Hồng Bàng Dynasty .