Specifically, it can be divided into: (1) tropical evergreen broad-leaved forest: mainly distributed in coastal areas and humid areas near rivers, hilly areas above 800m in the north and below 1 000m in the south. The main forest trees are Papilionidae, Fagaceae, Lauraceae and other families.
(2) Dry tropical deciduous forests: mainly distributed in the central plateau of Vietnam. The main forest species is borneol, and most of them form sparse forests. If there is enough water, a closed stand can also be formed.
(3) Subtropical evergreen broad-leaved forest: mainly distributed in the border areas between Vietnam and China and Laos. The main tree species in the forest are FAGACEAE, Lauraceae and Ericaceae.
(4) Mangroves: mainly distributed in the southern Mekong Delta and the coastal areas of the Red River Delta.
(5) Coniferous forest: mainly distributed in the plateau area above 1 000m in the south and the area above 1 500m in the north, with Fokienia hodginsii and Cunninghamia lanceolata as the main trees.
Environmental issues:
1, biodiversity is decreasing, species of animals and plants are rapidly decreasing, and some precious animals and plants are extinct. 2. It leads to serious soil erosion and land desertification, which worsens the basin environment, reduces the amount of land, and some secondary disasters occur frequently. 3. It has an impact on the local climate, exacerbating the local climate drought and affecting the atmospheric circulation.