1. Guotai An and wind databases, taking Guotai An data as an example: enter the database and select the data center-select the sub-database according to your own needs-select the time period-select the code-select "small and medium-sized enterprises" or "Growth Enterprise Market" in the stock market classification;
2. Shenzhen Stock Exchange, choose small and medium-sized enterprises;
3. China industrial enterprise database, but only industrial enterprises can be checked;
4. Eye inspection and enterprise inspection. Some information of small and medium-sized enterprises is public and can be used directly;
5. It will also be published in the Statistical Yearbook of Small and Medium Enterprises;
6. According to some references about small and medium-sized enterprises, data sources are generally marked, and you can trace back to the data you want according to these data sources;
7. It is convenient to buy data from a fish and a treasure, but you must find something reliable;
Ps: Of course, the best way is to get first-hand resources by yourself.