According to financial statistics, as of February 25th, 2023, there were 4,685 A-share listed companies in China, including 2,032 on the Shanghai Stock Exchange, 257/KLOC-0 on the Shenzhen Stock Exchange and 82 on the North Stock Exchange. Among these listed companies, there are 1655 main board companies, 377 science and technology innovation board companies and 148 1 small and medium board companies.