How about the planning of Mazhuqiao subway?

Construction started in 2025 and was completed and opened to traffic by the end of 2027.

According to Sohu. Com, Mazhuqiao subway is the S6 line of Beijing suburban/regional railway, also known as Beijing Rail Transit 2 1 line. This is a planned subway line, which aims to connect many areas in Beijing, including Tongzhou District, Chaoyang District and Changping District. Mazhuqiao subway station is a part of S6 line, so it is under construction planning. According to the plan, the line will start construction in 2025 and be completed and opened to traffic by the end of 2027.