Geologists say the Hoang Lien Mountain Range, with Fansipan as its highest peak, did not emerge in the mountainous North West of Vietnam until the neozoic period (circ. 100 million years ago). Fansipan, a rough pronunciation of the local name “Hua Xi Pan” means “the tottery giant rock”. The French came to Vietnam and in 1905 planted a landmark telling Fansipan’s height of 3, 143m and branded it “the Roof of Indochina”.