. Chongqing Statistical Yearbook 2013 is a large statistical yearbook compiled by Chongqing Municipal Bureau of Statistics and NBS Survey Office in Chongqing and published by China Statistics Press, which records the economic construction and social development of Chongqing in an all-round way. The yearbook covers the comprehensive data on Chongqing's social and economic development in 2012 and some major years in the history, as well as the major statistics on all the districts and counties (autonomous counties).

. The yearbook contains 22 chapters, namely 1. Comprehensive Statistics;2. National Economic Accounting;3. Population and Employment;4. Investment in Fixed Assets;5. Energy Consumption;6. Government Finance;7. Peoples Livelihood and Prices;8. Urban Construction;9. Resources and Environment; 10. Markets of Key Factors;11. Agriculture and Rural Economy;12. Industry;13. Construction;14. Transport, Postal and Telecommunication Services;15. Domestic Trade;16. Foreign Economic Relations, Trade and Tourism;17. Financial Intermediation;18. Education, Science & Technology and Culture;19. Public Health, Sports and Other Social Activities;20. Districts;21. Resettlement of Chongqing Reservoir Area of Three Gorges Project and 22. Statistics on Basic Units. There is also an Appendix which covers the main data of the whole nation and other provinces, autonomous regions and municipalities. There is a Brief Introduction at the beginning of each chapter, which introduces the main contents of the chapter and the sources of data. The Explanatory Notes on Main Statistical Indicators is provided at the end of each chapter.

. Most of the data in this publication are obtained from the annual statistical reports, while some others are obtained from sample surveys.

. The units of measurement used in this yearbook are international standard measurement units; and the basis of classification of this book complies with the national uniform standard.

. The statistical discrepancies of the total values or relative values due to rounding are not adjusted in this yearbook.

. The notes concerning individual indicators are placed at the lower part of the table or the lower part of the last page.

. Notations used in this yearbook: (blank spaceindicates that the figure is not large enough to be measured with the smallest unit in the table, or data are unknown, or are not available; “#” indicates a major breakdown of the total.

. Wed like to send our sincere acknowledgement various units and comrades for their vigorous assistances during the edition and translation of this yearbook. Due to our limited ability and the hasty time, faults and shortage are unavoidable. Any criticism or suggestion is appreciated.