I recommended Taifeng Park (North Gate),Binhai Square,Taidadangdai Art Museum,Taida Redai Botanical Garden (Northeast Gate),Haibin Gaosuqiao Xia Dai Zhuang Park
Here are some hotels near Taifeng Park (North Gate): TEDA International Hotel & Club,Teda Central Hotel,Mayfair Hotel,Tairong Hotel,Tianjin Atour Select Hotel