[Shanghai Stock Exchange: focus on monitoring risk warning stocks such as * STZeda, * ST amethyst] April 21, the Shanghai Stock Exchange announced that from April 17, 2023 to April 21, 2023, the Shanghai Stock Exchange will focus on monitoring risk warning stocks such as * STZeda and * ST amethyst. Regulatory measures such as suspending investor account trading were taken in time for 130 abnormal trading behaviors that aggravated market fluctuations, misled investors' decisions, and affected trading order. for 24 cases of abnormal trading of securities, such as lifting and suppression, and false declaration, we adopted written warnings and other regulatory measures, carried out special verification on 13 major matters of listed companies, and reported one clue of suspected illegal and illegal cases to the CSRC.