NBIR (Ningbo Intercity Railway.) also known as Ningbo Suburban Railway is a commuter rail service that connects urban Ningbo with outlying cities and counties beyond the reach of the city's Ningbo Rail Transit network. The "S"-numbered suburban rail lines are managed by the Ningbo Intercity Railway Co., Ltd., a subsidiary of CR Shanghai, part of the national railway company and partially owned by Ningbo Rail Transit Co., Ltd., the municipal company that operates the metro.
There are 1 suburban railway line currently in operation: Ningbo–Yuyao or Yongyu (S1).
