[ST Hengxin: The invalidated official seal has been fraudulently used and legal proceedings have been initiated] On November 13th, ST Hengxin (300081.SZ) announced that the official seal with company number 1301000919690 has been legally declared invalid on July 31, 2026. Recently, it was discovered that resigned employees Tong and Wu made complaints and reports to government departments and company customers in the name of the company and using the above-mentioned invalid official seal. Such behavior has nothing to do with the company and will not be recognized by the company. The company has initiated evidence fixation and legal accountability procedures for relevant fraudulent uses, and will report the case to the public security organs in accordance with the law depending on the progress.