A, the birthplace of xu in anhui fengyang, began migrating to the north

Ancient times if the wood was xu place in northern anhui fengyang, today it is the birthplace of the earliest xu.Live here the hsu, perish in xu, was a most popular.Then they are migrating north.Roughly after han wei jin southern and northern dynasties to sui and tang dynasties in China's northern shandong, henan and other places has formed several county, the east China sea and the ancient, cao bang, tung wan, etc.Specific move sowing time is: before the qin dynasty has moved in shandong.History is a Japanese father chui fook, also called xu city, across the sea god medicine youth about him, there are many records in history, "historical records" in the biographic sketches of qin shi huang is such records: "city, xu qi people saying words in the sea and there are three mountain, called penglai, the abbot, won the state, please together with child for male and female, then sent, send children thousands of men and women, of the sea."Xu city to visit the old medicine god's story, although there are some discrepancy in different historical records, but for more than two thousand years ago the hsu provides evidence that move sowing in shandong.The eastern han dynasty who moved on again in the past to today's gansu province.That is to say, at the time of the han dynasty, xu have planting in large areas of the north.So a warmth-loving creature is earlier than other name.According to the hall of the east China sea the hsu genealogy records, when the han emperor, one sai-jo Xu Zhi moved to nanchang of jiangxi province;Two sai-jo moved to zhejiang longyou;Three sai-jo separation in zhejiang, jiangxi, jiangsu province, such as a lot of places.

Second, so heavily warmth-loving creature starts from the wei and jin dynasty

Sui and tang dynasties in the south of our country has further developed.Dynasty, xu again by jiangxi shicheng moved to fujian province shanghang, liancheng, etc.The yuan dynasty, so the main breeding in widely in jianghuai area in anhui, jiangsu, henan, shandong.Han wei jin southern and northern dynasties, so have been developed to hebei, shanxi, shaanxi, gansu, jiangxi, zhejiang, guangxi, sichuan, hubei and other places.The tang dynasty, xu ShiRu fujian and guangdong, the late Ming dynasty in Taiwan.

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As the main so as early as the qin and han dynasties period have been removed from the north, northern China several times the war damage to xu relatively light.Especially in the song, yuan, Ming period, so in four provinces of jiangxi and zhejiang Sue fujian reproduce the most, especially in jiangsu, the formation of the east China sea, cao bang, five family Ya, puyang, dongguan, eventually formed a typical Oriental most popular today.

In short, so at the time of qin and han dynasties mainly distributed in the lower reaches of the Yellow River region in our country, especially in shandong reproduce the most exuberant.From the wei and jin dynasty to the tang dynasty, so the main breed in the huaihe river, and most of the region, the Yangtze river after the song dynasty, has been distributed in the jiangnan region.As for large Numbers of our country in the southwest of the hsu is the tang dynasty.

Third, from xia dynasty to the qing dynasty, xu's most populous region of jiangxi, zhejiang, shandong, Sue

From xia dynasty to Qin Chu, xu has been active, ten thousand people, about the country's population of 1.1 ﹪, ranked 17th.Xu is the first big province of jiangxi province, which accounts for xu's population of 23.5 ﹪, 2.4 ﹪ of the total population in jiangxi province.In the national distribution mainly concentrates in jiangxi, zhejiang (17.1 ﹪), (10.9 ﹪) in shandong, jiangsu (10.6 ﹪), these four provinces so roughly so 62 of the total population of the country.Second distribution of fujian (8.3 ﹪), (5.9 ﹪) in anhui, sichuan (5.4 ﹪), hubei < > (5.3 ﹪), henan (5)), so in the five provinces of the concentrated again 30 ﹪.National has formed with the center of jiangxi and zhejiang so large clusters.So the population of guangdong, yunnan and the northwest region is very rare.

Four, Ming dynasty for xu first big province of zhejiang, followed by jiangsu, jiangxi

Ming dynasty (1368-1644), so there are about 1.92 million people, about 2.1 ﹪, its population was ranked 10th.Reflecting the 600 national population growth rate of pure is 20 ﹪, so population growth is much higher than the population growth, 600 years so pure population growth rate as high as 128, pure rose by 1.08 million people.Ming dynasty, for xu first big province, zhejiang province, which accounts for xu 35.1 ﹪ of the population, which accounts for 4.5 ﹪ of the total population in zhejiang province.In the national distribution mainly concentrates in zhejiang, jiangsu (20.2 ﹪), (9.2 ﹪) in the three provinces of jiangxi, the three provinces so roughly so 64.5 ﹪ of the population, the distribution of the second.So in national distribution mainly concentrated in jiangsu (14.2 ﹪), guangdong (10.3 ﹪), zhejiang (8.9 ﹪), sichuan (7.4 ﹪) four provinces, about xu (41) of the total population of the country, secondly in shandong (6.8 ﹪), (6.6 ﹪) in jiangxi, anhui (5.8 ﹪), (5.7 ﹪), henan, hubei (5.1 ﹪), so in the five provinces of the concentrated again 30 ﹪.Jiangsu province is the first big province, xu 3.9 ﹪ of the province's population.The country formed the Yangtze river delta region, guangdong in anhui (7.1), (5.7) in fujian province and shandong (4.8), (4.2) of hubei province, the four provinces of xu and concentrated by 21.7 ﹪.In the southwest and northwest regions, so is still rare.Reflecting period, so the distribution of the overall pattern of change is bigger, its population is mainly composed of migration, north southeast sichuan region so mainly to migration systems and the south.The country is still in the Yangtze river delta region as the main xu gathered areas, but in the southeast of fujian and guangdong to form another chunk so population centers.

Five, the Ming dynasty still so 13 times of population growth

Since the Ming dynasty 600 years, so the population soared to more than 2000 by 1.92 million, up nearly 11 times.An average of nearly 93 million people of the Ming dynasty and today's population by 1.2 billion, the population increased by 13 times.So the rate of population growth rate is lower than the population growth in the country.So in the past 1000 years the growth rate of population is a factory in sichuan and eastern three high rate so distribution area.In nearly 600 years, so the degree of population movement and direction and the song and Ming dynasty, had the very big difference between flow direction, in particular, from the east to the central China, north China and sichuan a property is greater than the north to the southeast of migration, at the same time, to the northeast guangdong and immigration has become the important direction of flow.

Contemporary frequency, so the population distribution of density per unit area of the highest in central and southern jiangsu and northern zhejiang hangjiahu plain, shandong yantai region, so population reached more than 9 people per square kilometer, the central region is as high as more than a dozen people.

So the distribution density of the highest (more than 7.2 people/sq km) area occupies a land area of 3.4 ﹪, so population about 2.93 million;3.6-7.2 / total land area of 14.4 square kilometers of area, so the population about 6.67 million;1.8 3.6 people per square kilometer area occupies a land area.