Tianjin Metro Line 1 was extended from Donggulu to Shuangqiaohe on July 1
https://www.urbanrail.net/as/cn/tian/tianjin.htm
It was extended in parallel with Line 9. But, Line 11 runs much nearer to Line 9. The approximate distance between Line 9 and 11 is 1km. I wonder why 3 metro lines are running so densely in this area.