The Zhitong Finance App learned that on April 21, the Shanghai Stock Exchange released an overview of Shanghai's market supervision. From April 17 to April 21, the Shanghai Stock Exchange focused on monitoring risk-warning stocks such as*ST Zeda (688555.SH) and *ST amethyst (688086.SH), etc., promptly took supervisory measures such as suspending investor account transactions for 130 abnormal trading acts that increased market fluctuations, misled investors' decisions, and affected transaction order. It took written warnings and other supervisory measures on 24 cases of abnormal securities trading behavior such as suppression and false declarations, and carried out special checks on 13 important matters of listed companies, and reported 1 clue to the Securities Regulatory Commission on suspected illegal violations.

From April 17, 2023 to April 21, 2023, the corporate supervisory department of the Shanghai Stock Exchange sent a total of 9 supervisory work letters, including 1 supervisory inquiry letter and 8 supervisory work letters; through in-fact and post-supervision, listed companies were required to disclose 35 supplementary and corrective announcements. In response to information disclosure violations, 2 written warning orders and 1 disciplinary action order were taken. At the same time, joint supervision of information disclosure and abnormal stock prices will be strengthened, and 5 orders for insider trading and abnormal transaction checks are requested for companies disclosing sensitive information or obvious abnormalities in stock prices.