Is Zhangjiagang Tang Shi?

No, Zhangjiagang City is not in the countryside, because according to the planning of Zhangjiagang City, it is only considered as an urban area within the Second Ring Road, while Zhangjiagang City is outside the Second Ring Road, belonging to the suburbs, part of the city's administrative jurisdiction and belonging to the urban category, so Zhangjiagang City is not considered as a rural area, but belongs to the suburbs.