Among them, abnormality mainly refers to two situations: one is that the audited net profit of listed companies in two fiscal years is negative, and the other is that the audited net assets per share of listed companies in the latest fiscal year are lower than the face value of shares.
During the special treatment of stock trading of listed companies, the following rules should be followed: (1) The daily increase and decrease of stock quotation should be limited to 5%; (2) the name of the stock is changed to the original name, and the word "ST" is added before the name; (3) The interim reports of listed companies must be audited.
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