Three-dimensional Chemistry: Wang Wenxu plans to reduce his holdings by 0.0186%.

Announcement of three-dimensional chemistry: Wang Wenxu, Vice President and Chief Financial Officer of the company, holds 482,600 shares, accounting for 0.0744% of the total share capital of the company. Due to personal financial needs, he plans to reduce his holdings by no more than 120,700 shares, accounting for 0.0186% of the total share capital of the company, through centralized bidding trading within 3 months after 15 trading days from the date of this announcement, from October 16, 2025 to January 15, 2026. He is not allowed to reduce holdings during the window period.