What natural vegetation and beaches are there or have been in Tianjin?

The natural vegetation should be China rose and other rosids vegetation. These years, halophytic vegetation takes up a large part due to the air pollution. I just heard this from one of my friends living in the city.

Near Tanggu, there is a Coastal Beach (Haibin Yuchang), where you can well enjoy yourself.

I'd like to know if there was vegetation before in the city that has been destroyed or ruined by tourism for my Geography Homework.