文中的外来人口,是指第四次人口普查所统计的离开户口所在地一年以上的人口,属于流动人口的一部分,是未发生户口迁移的实际迁移人口。据“四普”资料,1990年6月30日全国有这类人口2131.3万,占全国总人口的1.88％,但广东省该比例达5.25％,在全国各省、市、自治区中位居首位。 The term “migrant population” as used in the fourth census refers to the number of migrants who left the account for more than one year as counted by the fourth census. They are part of the migrant population and are the actual migrants who have not migrated. According to the data of the “four generals”, as of June 30, 1990, there were 21.313 million such people in the country, accounting for 1.88% of the total population of the country, but the proportion in Guangdong Province reached 5.25%, ranking the first among provinces, municipalities and autonomous regions across the country.