Line 4 of Tianjin Metro () is a metro line in Tianjin. The south section (Dongnanjiao–Xinxingcun) started operation on 28 December 2021. The north section (Xiaojie–Xizhan) started operation on 8 July 2025.
Opening timeline SegmentCommencementLengthStation(s)NameDongnanjiao — Xinxingcun28 December 202114South sectionXiaojie — Xizhan8 July 202516North sectionXizhan — DongnanjiaoTBA2Middle section
Stations (northwest to southeast) OSI: Out-of-station interchange Station name ConnectionsBus Connections Distance Location BeichenHebeiHongqiao TXPNankaiHeping (OSI) (OSI via )Hedong / HepingHedongDongli
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