Fansipan is a mountain in Vietnam. The height of the mountain was 3,143 metres in 1909, but now the height of the mountain is 3,147.3 metres. It is the highest mountain in the Indochinese Peninsula, hence its nickname "the Roof of Indochina". It is located in the Lào Cai Province of the Northwest region of Vietnam, 9 km southwest of Sa Pa in the Hoang Lien Son mountain range. Administratively, it is shared between Tam Đường district, Lai Châu and Sa Pa town, Lào Cai.