Phan Xi Phang, Fansipan, or Phan Si Phang is the highest mountain in Vietnam, also the highest of the three Indochina countries, which is called "Indochinese Snake" (3,143 m) in Hoang Lien Son mountain range, Sa Pa town about 9 km to the southwest, bordered Lao Cai and Lai Chau provinces in northwestern Vietnam. In the local dialect, the mountain is called "Hua Xi Pan" and means a giant stone plateau. Phanh Xi Peng was formed in the vicinity of the Permian - Triassic period of the Paleozoic and Great Paleozoic. Mesozoic is about 260-250 million years old. [2] Each year this mountain peak is 0.032m higher. The vegetation in Phan Xi Pang is quite rich. There are 1,680 species divided into 679 genera in 7 groups. There are some types of rare. At the foot of the mountain are the rice, jackfruit, dense with thick density create the sites Coc Lue (Coc Gạo), Coc San (Coc Mit), etc. From here to the height of 700 m is the tropical belt with dense primitive forests, creeping vines. From 700 m upwards, there are three layers of seedlings, four of which are hugging, 50-60 m high, and several hundred years old. From a height of 2,800 m, covered with soil is dwarf structure, the bushes are about 25-30 cm low, the whole tree is bare, the tops are a little fluttering, so this species is called architecture. Alternatively, some of the trees of the family such as seagrass, roses, royal family. To Sa Pa, you definitely have to climb up the mountain once, watching the scenery and breathe fresh air.Fansipan is the self. Every Vietnamese landlord mentioned his homeland.