Area comparison map:

slightly smaller than the US

Land boundaries:
total: 22,457 km
[see also: Land boundaries - total country ranks ]
border countries (15): Afghanistan 91 km, Bhutan 477 km, Burma 2129 km, India 2659 km, Kazakhstan 1765 km, North Korea 1352 km, Kyrgyzstan 1063 km, Laos 475 km, Mongolia 4630 km, Nepal 1389 km, Pakistan 438 km, Russia (northeast) 4133 km, Russia (northwest) 46 km, Tajikistan 477 km, Vietnam 1297 km

Coastline:
14,500 km
[see also: Coastline country ranks ]

Maritime claims:
territorial sea: 12 nm
[see also: Maritime claims - territorial sea country ranks ]
exclusive economic zone: 200 nm
[see also: Maritime claims - exclusive economic zone country ranks ]
contiguous zone: 24 nm
[see also: Maritime claims - contiguous zone country ranks ]
continental shelf: 200 nm or to the edge of the continental margin
[see also: Maritime claims - continental shelf country ranks ]

Climate:
extremely diverse; tropical in south to subarctic in north
More Climate Details

Terrain:
mostly mountains, high plateaus, deserts in west; plains, deltas, and hills in east

Elevation:
mean elevation: 1,840 m
[see also: Elevation - mean elevation country ranks ]
lowest point: Turpan Pendi -154 m
highest point: Mount Everest (highest peak in Asia and highest point on earth above sea level) 8,848 m

Natural resources:
coal, iron ore, helium, petroleum, natural gas, arsenic, bismuth, cobalt, cadmium, ferrosilicon, gallium, germanium, hafnium, indium, lithium, mercury, tantalum, tellurium, tin, titanium, tungsten, antimony, manganese, magnesium, molybdenum, selenium, strontium, vanadium, magnetite, aluminum, lead, zinc, rare earth elements, uranium, hydropower potential (world's largest), arable land

Land use:
agricultural land: 54.7% (2011 est.)
[see also: Land use - agricultural land country ranks ]
arable land: 11.3% (2011 est.)
[see also: Land use - arable land country ranks ]
permanent crops: 1.6% (2011 est.)
[see also: Land use - permanent crops country ranks ]
permanent pasture: 41.8% (2011 est.)
[see also: Land use - permanent pasture country ranks ]
forest: 22.3% (2011 est.)
[see also: Land use - forest country ranks ]
other: 23% (2011 est.)
[see also: Land use country ranks ]

Irrigated land:
690,070 sq km (2012)
[see also: Irrigated land country ranks ]

Population distribution:
overwhelming majority of the population is found in the eastern half of the country; the west, with its vast mountainous and desert areas, remains sparsely populated; though ranked first in the world in total population, overall density is less than that of many other countries in Asia and Europe; high population density is found along the Yangtze and Yellow River valleys, the Xi Jiang River delta, the Sichuan Basin (around Chengdu), in and around Beijing, and the industrial area around Shenyang

Natural hazards:
frequent typhoons (about five per year along southern and eastern coasts); damaging floods; tsunamis; earthquakes; droughts; land subsidence

volcanism: China contains some historically active volcanoes including Changbaishan (also known as Baitoushan, Baegdu, or P'aektu-san), Hainan Dao, and Kunlun although most have been relatively inactive in recent centuries

Environment - current issues:
air pollution (greenhouse gases, sulfur dioxide particulates) from reliance on coal produces acid rain; China is the world's largest single emitter of carbon dioxide from the burning of fossil fuels; water shortages, particularly in the north; water pollution from untreated wastes; coastal destruction due to land reclamation, industrial development, and aquaculture; deforestation and habitat destruction; poor land management leads to soil erosion, landslides, floods, droughts, dust storms, and desertification; trade in endangered species

Environment - international agreements:
party to: Antarctic-Environmental Protocol, Antarctic Treaty, Biodiversity, Climate Change, Climate Change-Kyoto Protocol, Desertification, Endangered Species, Environmental Modification, Hazardous Wastes, Law of the Sea, Marine Dumping, Ozone Layer Protection, Ship Pollution, Tropical Timber 83, Tropical Timber 94, Wetlands, Whaling
signed, but not ratified: none of the selected agreements

Geography - note:
note 1: world's fourth largest country (after Russia, Canada, and US) and largest country situated entirely in Asia; Mount Everest on the border with Nepal is the world's tallest peak above sea level

note 2: the largest cave chamber in the world is the Miao Room, in the Gebihe cave system at China's Ziyun Getu He Chuandong National Park, which encloses some 10.78 million cu m (380.7 million cu ft) of volume

note 3: China appears to have been the center of domestication for two of the world's leading cereal crops: millet in the north along the Yellow River and rice in the south along the lower or middle Yangtze River