HAOHAI BIOTEC (06826) announced that it recently received notification from Mr. Jiang Wei, one of its controlling shareholders and actual controllers. As part of the investigation into a suspected insider trading case involving Mr. Jiang Wei, the Shanghai Public Security Bureau has issued a Decision on Residential Surveillance. The decision stipulates that Mr. Jiang Wei will be subject to residential surveillance effective from April 29, 2026. Previously, in December 2025, Mr. Jiang Wei had received a Decision on Administrative Penalty ([2025] No. 151) from the China Securities Regulatory Commission for activities including insider trading. Details can be found in the company's announcement dated December 24, 2025, disclosed on the Shanghai Stock Exchange website (www.sse.com.cn). The matters involved are unrelated to the company. Mr. Jiang Wei does not hold a position as a director, senior manager, or any other role within the company. This matter is not expected to have a significant impact on the company's daily operations. As of the date of this announcement, the company's production and business activities continue to operate normally and orderly. The company will continue to monitor the progress of the aforementioned matter and will fulfill its information disclosure obligations in accordance with relevant laws and regulations.