Shanghai soared four places to become the world’s 10th most expensive city for expats, according to Mercer’s 2014 survey on cost of living. Beijing closely followed at 11th, also with a 4-place jump from last year. At the same time, Shenzhen moved up 12 places to No 17 while Guangzhou leaped 11 spots to No 24. The survey covers 211 cities all over the world and measures the comparative cost of over 200 items in each location. Luanda (Angola) and N’Djamena (Chad) are the two most expensive cities in the world for expats.