[4] The line will use 8-car Type D rolling stock[2] and will open from 2026.

[3][5] The line was originally planned to begin at Dongfengbeiqiao station and will end at Juhewan station in Pinggu District.

The line will still start in the urban center of Pinggu District.

However, when reaching Yanjiao the line will instead head south through Tongzhou District and run under Chaoyang Road between Line 6 and the Batong Line towards Beijing central business district (Beijing CBD).

This was done to serve more populated areas of the city and enhance integration between Beijing's city center and its new sub-center in Tongzhou District.