It's a mountainous and vast regions, with major plains situated along the coast and at the river mouths, of which the Hangjia Lake plain in the South Yangtze River delta is the largest in area.
Offshore islands are numerous.
Its chief river, the Qiantang River runs across the northern part of the Province. Zhejiang has a north sub-tropical humid climate. Principal mineral resources are alum, and fluorspar, in addition to coal, iron, lead and pyrite. Zhejiang has well-developed light and heavy industries. The former mainly comprise cotton textile, linen, silks, papermaking, tea processing and wine-brewage.