[3][4] Line 11 connecting Kunshan city which is under Suzhou's administration, and beyond to the Shanghai Metro was completed on June 24, 2023.

It is a line running generally north–south, from Suzhou North Railway Station in north Xiangcheng District to Baodaiqiao South station close to Precious Belt Bridge located in Wuzhong District.

On December 28, 2013, line 2 started service and became a part of Suzhou Rail Transit system.

Its main line leads from Longdaobang to Tongli in the south/south east of Suzhou.

After reaching Suzhou railway station, it approximately follows Renmin road and Dongwubei road reaching further south until Tongli in Wujiang District.

This branch is supposed to follow the same path as the main line until Hongzhuang, then turning into south western direction leading to Youxiang Road.

Line 5 opened on 29 June 2021 and runs from Taihu Xiangshan to Yangchenghu South.

It serves Kunshan City and connects to the Shanghai Metro, with the terminal station of Huaqiao also being an interchange station where passengers can interchange to Line 11 of the Shanghai Metro.

The first section connecting the northern neighboring cities of Zhangjiagang and Changshu.