Line 4 is a line of Suzhou Rail Transit. It runs in a north-south alignment from Longdaobang station in Xiangcheng District's the northern suburbs, to the canal town of Tongli in Wujiang District in the south and Muli in the southwest.[1] The line is 52.8 km long with 38 stations,[2] which consists of a 41.5 kilometer long main line with 30 stations and a branch line.[3]
Groundbreaking occurred on December 31, 2010 in Wujiang, and the line was constructed between 2012 and 2016.[4] Operations started on April 15, 2017.
Trains are run in six-car formations, and have a maximum speed of 80 km/h.[1]