Class A and Class B corporate investors are divided according to the financial strength and credibility of institutional investors. Class A refers to some large enterprises, but they hold shares for a long time; Class B refers to the general legal person investors, whose financial strength is relatively weak compared with other investors. Of course, selling it is not good news, but it also depends on the market situation. This is the difference between public offering and private offering. Public offering means high price and low income, while private offering means low price and high income.

A shares, that is, RMB ordinary shares, are ordinary shares issued by companies in China for domestic institutions, organizations or individuals (from April 20 13, 1, domestic, Hong Kong, Macao and Taiwan residents can open A-share accounts) to subscribe and trade in RMB.

A shares are not physical shares. Electronic recording, paperless, implementation of "T+ 1" delivery system, price limit (10%). The participating investors are Chinese mainland institutions or individuals. The stocks of listed companies in China are divided into A shares, B shares, H shares, N shares and S shares, mainly depending on the listing location and investors. Trading in China A-share market started on April 8, 20 1990 and 20 15, and A-shares returned to the 4000-point mark after seven years.