Starting from December 21, the Tianjin Metro App will realize cross-city code scanning and interoperability with the Chengdu and Zhengzhou Rail Transit Apps. So far, the cross-city code scanning and interoperability function of the "Tianjin Metro" App has been expanded to 12 cities.
By then, the Tianjin Metro App can achieve cross-city scanning and interoperability with 12 cities including Beijing, Shanghai, Guangzhou, Chongqing, Hohhot, Nanjing, Nanchang, Changzhou, Shijiazhuang, Suzhou, Chengdu, and Zhengzhou.
