Terrain. Areas of Viet Nam is mostly mountainous (especially Northern) between the flat Red River and the Mekong basin also has a long, narrow sea coast from North to South.
The terrain is mostly mountainous areas of Vietnam high. (Especially northern) between the Red River basin. And south of the Mekong River basin also has a narrow coastline. The length from north to south
The terrain.The area of Vietnam are mostly high mountains (especially in the North) between the Red River Valley And the southern coastal plains river is also narrow, long from north to south.