The line will include four new stations, including an underground station at the airport, and is expected to cost Yuan 27.4bn ($US 4.2bn), including Yuan 800m for rolling stock. Construction is expected to take around three-and-a-half years.
The Beijing - Daxing International Airport section will have a design speed of 250km/h, with the remainder of the line south to Bazhou being constructed for 350km/h operation.
Construction began on the new airport in December 2014 and the project is due to be completed in September 2019.
