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中国西北四省(区)系指青海省、甘肃省、宁夏回族自治区和新疆维吾尔自治区。如果以东径108°与北纬32°为座标,则该地区处于座标的左上部。据1994年统计资料,四省(区)共有土地面积277．6万km2,约占全国的29%;人口5000万,占全国的4%左右;国民生产总值1044．45亿元,占全国的3．3%;耕地773．6万公顷,占全国的8%;年平均水资源总量1800亿m3左右,约占全国的8%。矿产资源丰富,铝、镍、钾盐、镁盐居全国第一,锌、煤、石膏居全国第二,锑、石油、天然气居全国第三。
The four provinces of Northwest China (Region) refer to Qinghai Province, Gansu Province, Ningxia Hui Autonomous Region and Xinjiang Uygur Autonomous Region. If the 108 ° east and north latitude 32 ° coordinates, then the area is in the upper left coordinates. According to the 1994 statistics, the total land area of the four provinces (autonomous regions) is 2.776 million km2, accounting for 29% of the national total; the population is 50 million, accounting for about 4% of the national total; the GNP is 104.445 billion yuan, Of the total; 3.3% of the total land area; 7.336 million hectares of arable land, accounting for 8% of the national total; and the average annual water resource is about 180 billion m3, accounting for about 8% of the national total. Rich in mineral resources, aluminum, nickel, potash and magnesium salt rank first in the country. Zinc, coal and gypsum rank second in the country. Antimony, petroleum and natural gas rank third in the country.