Huafeng measurement and control: Chief Financial Officer Huang Ying has reduced her holdings by 0.0021%.

Hua Feng Measurement and Control Announcement: The company's Chief Financial Officer, Huang Ying, previously held 11,519 shares, accounting for 0.01% of the total; on February 2, 2026, through centralized bidding, she reduced her holdings by 2,800 shares, accounting for 0.0021%, at a price of 282.75 to 283.05 yuan/share, with a total amount of 792,000 yuan. The reduction plan has been completed, and she currently holds 8,719 shares, accounting for 0.0064%.