Many people talked about the “sacred” factors of Dien Ban land, but detailedly saying is the hardly possible thing. Under the Mac dynasty, Duong Van An discussed in the book “Ô Châu cận lục” when he was writing about Thuan Quang land: “There were these rivers and mountains, these characters when heaven and earth appeared. Because after heaven and earth had opened, rivers and mountains appeared, these personalities were born after there were rivers and mountains”