The Northeast, Northwest and Western Vietnam is mountainous and Central du include many mountain ranges, massifs, plateaus and hills. It is inhabited by many ethnic groups. Huge mountains here as Hoang lien mountain in the North and in Central. Many mountains have elevations above 2,000 m, including Fansipan is the highest, amounting to 3143 meters. In the Northeast and central mountain ranges, running into the sea, forming the magnificent natural scenery, the MajestyRed River Delta is a triangular region, an area of 15000 square kilometers, slightly smaller but more densely populated Mekong Delta. Time before it is an inlet of the Gulf of Tonkin, gradually it is thanks to mass accretion alluvial deposition of giant rivers, in the system of Red River and Thai Binh river systems, through thousands of years make further encroachment into the sea each year, about one hundred meters. This is the home of Vietnamese ancestry. Before 1975, the Red River Delta accounted for 70% of agricultural output and 80 percent of industrial output in northern Vietnam.
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