The stock prices of the four companies involved in the case have all hit the lower limit.

ST Shuyuan, Aonong Biotech, Huarui Century, and Lanshi Heavy Equipment stocks all hit limit down today. On the news front, on the evening of April 22nd, the four companies successively issued announcements disclosing that they are under investigation by the China Securities Regulatory Commission for suspected violations of information disclosure laws and regulations.