Do I have to get off at tianjin railway station to take the Harmony train from Beijing? Is it the same station as Tianjin Railway Station?

Yes, it's next to Tianjin Railway Station-jiefang bridge.

There are many hotels with quick access, as shown in the figure;

Hotel New Dragon

Address: tianjin railway station Square.

Tel: (022)60532999

Parkson Express Hotel

Address: Building E, Longmen Building, Jianguo Road 1

Tel: (022)24223837

Sumitomo Holiday Express Hotel

Address: Longmen Building, Tianjin Railway Station

Tel: (022)24225662

Address: South Third Exit of tianjin railway station East Railway Station

Tel: (022)58673666

26 1 m Tianjin Yaoxing Photography Service Co., Ltd.

Address: Room 1 1 11Zhang Zizhong Road, Heping District, Tianjin.

Tel: (022)27306522

277m Tianjin Textile Mall Co., Ltd.

Address: No.227, Zhang Zizhong Road, Heping District, Tianjin.

436 Mi Motel 168 Railway Station North Square Branch

Address: Intersection of Hualong Road and Zhao Xin Road, Hedong District, Tianjin

596 meters Home Inn (Tianjin Railway Station)

Address: No.5 Ziyou Road, Hebei District, Tianjin

Tel: (022)58 199388

626 miles Liyuan Hotel

Address: No.60 Jianguo Road, the intersection of Jianguo Road and Minsheng Road, Hebei Province

Tel: (022)60534568

48 1 Mi Jinjiang Inn (Railway Station Store)

Address: No.0/7, Progressive Road, Hebei District, Tianjin

Tel: (022)582 150 18.