Natural Conditions
Item
Territory
Area of Territory (10 000 sq.km)	960
Area of Sea (10 000 sq.km)	473
Average Depth of Sea (m)	961
Maximum Depth of Sea (m)	5377
Length of Coastline (km)	32000
Mainland Coastline (km)	18000
Island Coastline (km)	14000
Number of Islands	5400
Area of Islands (10 000 sq.km)	3.87
Climate
Distribution of Heat (Accumulated Temperature≥0℃)
Northern Heilongjiang and Tibet Plateau	2000-2500
Northeast Plain	3000-4000
North China Plain	4000-5000
Yangtze River Drainage Area	5800-6000
and the Area to the south of it
Area to the South of Nanling Mountain	7000-8000
Precipitation (mm)
Mid-Taiwan Mountain Area	>=4000
Southern China Coastal Area	1600-2000
Yangtze River Valley	1000-1500
Northern and Northeastern Area	400-800
Northwestern Inland	100-200
Tarim Basin, Turpan Basin and Qaidam Basin	<=25
Percentage of Climatic Zones to Total Area of Territory
Humid Zone (aridity<1.0)	32
Semi-Humid Zone (aridity 1.0-1.5)	15
Semi-Arid Zone (aridity 1.5-2.0)	22
Arid Zone (aridity>2.0)	31
a)The climate data refer to the average figures in many years.
b)Island area does not include that of Taiwan, Hong Kong and Macao.