1. National Data Network: A series of economic, social and demographic statistics released by the National Bureau of Statistics of People's Republic of China (PRC).

2. Digital resources of the National Library: digital versions of important statistical data and reports at home and abroad over the years.

3. China Economic Information Network: provides economic data of the whole country and provinces, cities and counties, including GDP, CPI, PPI, price index, etc.

4. Statistical Yearbook of China: A book compiled by the National Bureau of Statistics, which contains statistical data in various fields at home and abroad.

5. World Bank data: provide economic, social and environmental data of countries around the world, including GDP, population, finance and trade.

6. United Nations data: provides economic, social and environmental data of countries, including population, employment, education, health and trade.

7.OECD statistical database: provides economic, social and environmental data of member countries, and evaluates and compares the economic conditions of various countries.

8. Data warehouse: It contains various types of data sets, including data in economic, financial and social fields.