Xi’an Metro Line 1 phase three opensThe underground extension cost $US 958.2m. Photo Credit: Shutterstock/Hunter Bliss ImagesThe underground extension cost $US 958.2m. Premium Subscription Required You must be a premium subscriber to access this content: View Subscription Options Already a subscriber? Log in here Categories: Asia, Metros, NewsTags: China, Premium, XianMore on this story Xian metro launches tender for 722 carsNovember 30, 2022China to invest $US 127bn in urban rail projectsSeptember 6, 2012