一、《 广州统计年鉴—2021 》是一本全面反映广州经济和社会发展的资料工具书。本书通过大量的统计数据，全面客观地记录了2020年及重要历史年份广州市经济、社会的发展情况。
二、全书内容分为18个篇目，即：1．综合；2．人口；3．从业人员和工资；4．固定资产投资；5．能源和环保；6．财政和金融；7．价格指数；8．人民生活；9．城市建设；10．农业；11．工业；12．建筑业；13．运输和邮电；14．国内贸易；15．对外经济贸易和旅游；16．规模以上服务业；17．科技；18．教育、文化、体育、卫生、社会福利和其他。2020年开展了第七次全国人口普查，本书特设立人口普查专篇。在附录部分，收集了全国、广东省及香港特别行政区、澳门特别行政区主要经济指标。
三、本年鉴资料主要来自广州市的政府各级统计局、国家统计局广州调查队的各种定期统计报表和抽样调查资料，部分资料来自省属、市属各主管部门。
四、2014年广州市行政区划有调整，原黄埔区和原萝岗区合并为新黄埔区，原增城市和原从化市撤市设区。从2015年起，我市行政区划包括荔湾区、越秀区、海珠区、天河区、白云区、黄埔区、番禺区、花都区、南沙区、从化区和增城区等11个区，无县级市。
五、从2014年起广州市实施城乡一体化分市县住户调查制度，住户调查统计指标体系有较大变动。
六、根据《 国家统计局关于执行新国民经济行业分类国家标准的通知 》（国统字〔2017〕142号）要求，新《 国民经济行业分类 》从2017年统计年报和2018年定期统计报表统一开始使用。本资料中凡是涉及到分行业的表式（除个别部门提供的数据仍按旧行业分类，表中有注明），均按照新的行业分类《 国民经济行业分类GB/T4754-2017 》作调整。
七、从2018年起，新增《规模以上服务业》篇。
八、本年鉴总量指标计算所采用的价格除注明外均为当年价格。
九、读者在使用历年资料时，凡与本年鉴有出入的，均以本年鉴为准。
十、本年鉴中部分数据合计数或相对数由于单位取舍不同而产生的计算误差，均未作机械调整。
十一、本年鉴表中的符号使用说明：“空格”表示该项统计指标数据不详或无该项数据；“ … ”表示数不足本表最小单位数；“ # ”表示其中的主要项。
十二、2019年，根据第四次全国经济普查结果，对2008—2018年度地区生产总值、2010—2017年度工业、2011—2018年度年末全社会从业人员和1992—2018年度社会消费品零售总额数据进行了修订。
十三、2020年，根据第七次全国人口普查结果，对2011—2019年常住人口及常住人口城镇人口比重等数据进行了修正。
Ⅰ. Guangzhou Statistical Yearbook 2021 is a reference book that comprehensively reflects the economic and social development of Guangzhou. Through a large number of statistical data, this book comprehensively and objectively records the economic and social development of Guangzhou in 2020 and important historical years.
Ⅱ. The yearbook contains the following 18 chapters: 1. General Survey; 2. Population; 3. Employment and Wages; 4. Investment in Fixed Assets; 5. Energy and Environment; 6. Government Finance and Banking; 7. Price Indices; 8. People’s Livelihood; 9. City Construction; 10. Agriculture; 11. Industry; 12. Construction; 13. Transport, Postal and Telecommunication Services; 14. Domestic Trade; 15. Foreign Economy and Tourism; 16. Service Industry above Scale; 17. Science and Technology; 18. Education, Culture, Sports, Public Health, Social Welfare and Others. The Seventh National Census was carried out in 2020, and this book has a special chapter on the census. In the appendix, the main economic indicators of China, Guangdong Province, Hong Kong Special Administrative Region and Macao Special Administrative Region are collected.
Ⅲ. The data in the yearbook are mainly obtained from regular statistical reports and sample surveys conducted by Statistics Bureaus of all levels of government and the Survey Office of the National Bureau of Statistics in Guangzhou．Some data are collected from the departments of the provincial and municipal government．
Ⅳ. Since 2014 Guangzhou administrative division has been adjusted. The original Huangpu and Luogang districts have been merged into the new Huangpu district. The former Zengcheng City and the former Conghua City are divided into districts. Since 2015, Guangzhou city administrative division has included 11 districts, which are Liwan district, Yuexiu district, Haizhu district, Tianhe district, Baiyun district, Huangpu district, Panyu district, Huadu district, Nansha district, Conghua district and Zengcheng district, excluding county-level cities.
Ⅴ. Urban and rural integrated household survey is carried out in Guangzhou from 2014, statistical indicator system of urban and rural integrated household survey is changed greatly.
Ⅵ. According to the notice of the National Bureau of Statistics on the implementation of the new national standard of national economic industry classification (2017) 142, the new national economic industry classification has been used from the statistical annual report of 2017 and the periodic statistical report of 2018. In this data, all the tables related to sub-industries (except the data provided by individual departments are classified according to the old industry, as indicated in the table), are adjusted according to the new industry classification & GB/T4754-2017 of national economy.
Ⅶ. Starting from 2018, a new chapter entitled “Service Industry above scale” has been added.
Ⅷ. The prices used in calculation in the yearbook are current prices except noted．
Ⅸ. In any case the data of this book shall be deemed as the authoritative ones．
Ⅹ. In the yearbook all calculating errors of some total and regular figures for the difference of measuring units haven't been adjusted.
Ⅺ. Notations in this book：blank space indicates data are not available. “…” indicates not large enough to be rounded into the least unit of measurement. “#” indicates major item in a category.
Ⅻ. In 2019, according to the results of the fourth national economic census, the regional GDP from 2008 to 2018, the industry from 2010 to 2017, the entire society's employees at the end of the year from 2011 to 2018, and the total retail sales of consumer goods from 1992 to 2018 were revised.
ⅫI. In 2020, according to the results of the Seventh National Census, the permanent population and the proportion of permanent urban population from 2011 to 2019 were revised.