In response to a reporter's question on the release of classified supervision guidelines on information disclosure, the Shanghai Stock Exchange said that it would bring four types of companies into the scope and pay special attention to their information disclosure matters. It mainly includes the implementation of risk warning of stocks, the annual information disclosure evaluation of D, the annual report issued unable to express opinions or negative opinions, and the annual internal control issued unable to express opinions or negative opinions. This kind of company has been the focus of the market and supervision for a long time because of the concentration of risk and the small number of companies.