How is China’s population data counted？ These knowledge points should be understood.

　　People’s Daily Online, Beijing, May 13 (Yang Xi) Recently, the release of the main data of the seventh national census has aroused great concern from all walks of life. Some netizens found that the trend reflected by the census data published this time is inconsistent with that published in non-census years, so they raised some questions about individual data.

　　In this regard, the National Bureau of Statistics answered the above questions and related questions of population statistics.

　　How to count and publish population data?

　　At present, China’s demographic survey mainly has three ways:

　　The first is the national census, which is conducted once every ten years in the year when the mantissa meets "0", and the census data is published in China Census Data.

　　The second is the national 1% population sampling survey, which was conducted in the year when the mantissa met "5", and the survey data was published in the National 1% Population Sampling Survey Data.

　　Third, the national sample survey of population changes, the sample size accounts for about 1&permil of the total population; In addition to the census year and the sampling year of 1% population survey, it is conducted once a year, and the survey data are published in the Statistical Yearbook of China and the Statistical Yearbook of Population and Employment of China.

　　The main statistical indicators of the above three types of population data will be published in the annual data in the database of the National Bureau of Statistics.

　　Why is the trend reflected by census data inconsistent with that published in non-census years?

　　The population in non-census years is calculated according to the sampling survey data of that year. Due to the missing rate of sampling surveys in some years, there will be some deviations in the estimated population as a whole, and these deviations will continue to accumulate with the passage of time.

　　Carrying out the population census once every 10 years can comprehensively find out the number, structure and distribution of China’s population, let us know more clearly the development of China’s population in the past 10 years, and provide extremely valuable data for better studying population issues and formulating population-related policies.

　　So how to deal with this inconsistency? According to international practice and common practice, after the census, the annual data published between the two censuses are generally revised according to the census results, so as to reflect the population development track more truly and objectively. In the sixth national census and the just-concluded fourth national economic census, historical data were also revised according to census data. At present, this work is in progress, and the relevant data will be released on schedule after the revision is completed.

　　Is the population statistics based on household registration or residence?

　　At present, China’s population census and population survey are counted and summarized according to the resident population. The time standard for judging the permanent population is half a year, and the space standard is township, town and street.

　　The resident population is an important basic data for formulating the national economic and social development plan, evaluating the national economic production capacity, and evaluating the welfare level of residents. It has a wide range of applications, such as financial expenditure, urban construction, housing construction, allocation of public facilities, education investment, medical investment and public utility investment, etc., which need to be planned according to the size of the resident population.

　　The registered population refers to the registered population in a certain area, regardless of whether they go out or not, as long as they register their permanent residence in the public security household registration management department. The data of registered population is counted by the public security department. For a long time, China has established a set of perfect household registration statistics and management system, which has played an important role in social management.

　　How is the floating population data counted?

　　Floating population refers to the population whose residence is inconsistent with the township street where the household registration place is located, and who has been separated from the household registration place for half a year or more (excluding the separation of households within the municipal area). The survey indicators used to judge and reflect the floating population include: the place of registration, the place of residence at the time of investigation, the time of leaving the place of registration and the reasons for leaving the place of registration. The National Bureau of Statistics formulates a demographic survey system according to the Statistics Law of the People’s Republic of China, conducts demographic surveys on a regular basis, and publishes major demographic data such as permanent population, birth population, dead population, urban and rural population and floating population.