Line 4 of the subway in Ningbo, East China's Zhejiang province is put into operation on Dec 23. [Photo/cnnb.com.cn]

Line 4 of the subway in Ningbo, East China's Zhejiang province was put into operation on Dec 23, according to local media reports.

The 35.95-km-long subway line traverses the downtown area of Ningbo at a maximum speed of 80 kilometers per hour, stopping at a total of 25 stations between Cicheng town and Dongqian Lake.

Passengers can transfer to Line 1 at Daqingqiao Station, Line 2 at Ningbo Railway Station, Line 3 at Children's Park Station, and Line 5 at Ningbo South Higher Education Park Station.

The opening of the new line, which is the longest subway line in the city to date, will slash the travel time from both the two terminal stations to the city's downtown to half an hour.

The fare varies based on the distance and is capped at 10 yuan ($1.53) for a single trip.