The story
From a fictional place described in the 1933 novel Lost Horizon by British author James Hilton (1900–1954): see the quotation below. A Tibetan origin has been suggested, from ཞང (zhang, “name of a district of Ü-Tsang”) + རི (ri, “mountain”) + ལ (la, “pass”), therefore meaning "Mountain Pass of Zhang District".
Etymology from Wiktionary, CC BY-SA 4.0.