Tianjin Urban and Rural Construction Committee has announced that Metro Line 5 and the southern part of Line 6 will be ready to open in the first half of 2018
Meanwhile: A national public transit card, working on both bus and subway will be launched in the first half of 2018, this card will allow you to use the subway in more than 100 cities, including Tianjin, Beijing, Shanghai, Guangzhou, Shenzhen, Suzhou, Hangzhou, Nanjing and many more
Progressively that card will give and access nationwide to all form of local transportations (subway, buses, taxi) in a 2020 horizon. Some sharing bike companies are actually in negotiation to accept it.
The card will be accepted in all terminal with the logo
But we still do not know if a Chinese ID card will be needed to apply, or if they will accept passport applications.