Line 4 of Ningbo Rail Transit is a rapid transit line in Ningbo. It starts from Cicheng Town, Jiangbei District, and ends near Dongqian Lake in Yinzhou District. The project was approved on November 5, 2013 and opened on December 23, 2020. Construction of Line 4 started in 2011 with the groundbreaking of the North Ring Elevated Expressway with the second deck of the structure being used for Line 4 trains. The rest of the line started construction on November 30, 2015. The line will initially use 36 sets of six car B-type trains with a maximum service speed of 80 km/h (50 mph).

Line 1 of Ningbo Rail Transit is a rapid transit line in Ningbo. It starts from Gaoqiao Town in the west, crosses the central area of Ningbo, and reaches Beilun District in the east. The line started service on May 30, 2014.