Announcement on the Extension of Pledge Period for Part of the Shares Held by the Controlling Shareholder

Securities Code: 300815 Securities Abbreviation: Yutai Tianhuan Announcement No.: 2026-037 Yutai Tianhuan Environmental Development Co., Ltd. Announcement on the Extension of Pledge Period for Part of the Shares Held by the Controlling Shareholder The Company and the entire Board of Directors guarantee the truthfulness, accuracy, and completeness of the information disclosed, and are free from any false records, misleading statements, or significant omissions. I. Basic Information on Share Pledge by Shareholders Yutai Tianhuan Environmental Development Co., Ltd. (hereinafter referred to as the "Company") recently received a notice from its controlling shareholder, Xizang Tianzhirun Investment Management Co., Ltd. (hereinafter referred to as "Xizang Tianzhirun"), stating that it has completed the procedures for extending the pledge period for part of its holdings in the Company's shares. The specific details are as follows: (I) Details of the Share Pledge Extension This Time | Shareholder Name | Whether Controlling Shareholder or First Major Shareholder and Its Concerted Parties | Number of Shares Pledged This Time (shares) | Proportion of Its Holdings (%) | Proportion of Company's Share Capital (%) | Whether Restricted Shares | Whether Unrestricted Shares