[14] The train sets of Daxing Airport Express are built by CRRC Qingdao Sifang.

[16] However, the plan would cost more than 40 billion yuan, which was considered too expensive for a dedicated line that would only serve passengers going to and from the airport.

[17] The parallel section with Line 19 was abandoned and the route was shortened to the stretch from Caoqiao to Daxing Airport.

The line will operate at a top speed of 160 km/h (99 mph) using Type D[3][4][5] rolling stock, which is fully automated.

A northern extension to Lize Business District station is under construction,[10] with a length of 3.5 km (2.17 mi).

Line R1 of Xiong'an Rail Transit will through-operate with Daxing Airport Express.