Haitai Development: From April 14th, implement other risk warnings, and change the stock abbreviation to ST Haitai.

Haitai Development announcement: On April 10, 2026, the Company received a "Notice of Administrative Penalty Prior Notification" issued by the Tianjin Securities Regulatory Bureau. According to relevant regulations, the Company's stock will be subject to other risk warnings. The Company's stock will be suspended for one day on April 13, 2026, and other risk warnings will be implemented starting from April 14, 2026. After implementation, the A-share abbreviation will be changed to "ST Haitai," and the daily price limit for stock price fluctuations will be 5%.