YSDZ(SZ:002289) Sou Hu Cai Jing·2025-09-26 12:00Regulatory Actions - Shenzhen Stock Exchange issued regulatory letters for 3 violations related to information disclosure and operational compliance from September 19 to September 25 [2] - A total of 11 inquiry letters and 4 other letters were sent out during the same period [2] Market Surveillance - From September 22 to September 26, the Shenzhen Stock Exchange took self-regulatory measures against 176 instances of abnormal trading behavior, including market manipulation and false declarations [2] - Continuous monitoring is being conducted on "*ST Yushun" [2] Investigations - The exchange conducted investigations on 2 major events involving listed companies and reported 2 cases suspected of illegal activities to the China Securities Regulatory Commission [2]