Beijing lies in the northern plain of China, with a decrease in altitude from the northwest to the southeast.

It is surrounded by mountains in the north, west and east, facing a vast stretch of open plain in thesoutheast. Tongzhou is situated on this plain area with even altitude averaging 20 meter.

Beijing is in the mild temperate zone and has four seasons that are clear cut from each othenannual temperature averages 11.3'C and its annual rain amounts to about 620 millimeters.

Tongzhou abounds in water resources. There are altogether 13 rivers, big or small, including the Grant Canal, River Tonghui, River Wenyu, River Liangshui, and River Chaobai, with a total length of 245kilometers. The forestation coverage is 46% in Tongzhou.