What are the data sources in big data analysis?

When analyzing the accounting statements of listed companies to reflect the true degree of their financial operating results and cash flow, it is necessary to collect a large amount of public information first.

This information can be divided into two categories:

One is the annual report, interim report, quarterly report and announcement of the board of directors published by listed companies over the years; The other is the statistics and reports published by the government.

The main sources of this information are newspapers, magazines and the Internet.