The tradition of worshiping ancestors and building patriotism is the first duty of the Vietnamese people. That is also the first task of education. So, children in the country, from an early age, need to learn the history of their country, to know the merits of building and defending the country of their previous Ancestors; need to study the geography of the country, to know the shape of home country. In the 1920s, when Vietnamese writing was first introduced, there were not many Vietnamese people familiar with the history and geography of their country, because the number of books published was very rare. In 1924, a group of authors, including Do Dinh Nghiem, Ngo Vi Lien and Pham Van Thu, compiled the book "Geography of the Northern Provinces of the North", specifying the shape of the mountains, the population, the climate, the provinces and the districts. , Village; travel roads; agricultural and agricultural products; industry; trade; along with detailed maps.