Gansu Power Investment Zhangye Power Generation Co., Ltd. Notice of Changes in Inquiry for Hand Lock Core and Other Materials Change Notice No.: GSDTBGGG202504150001 The inquiry notice for hand lock core and other materials issued by our company on April 8, 2025 (Project No.: GSDT2025040800021）， The following changes have been made: the deadline for quoting before and after the type change is 17:27:09:09 on April 14, 2025, and 09:20:33 on April 16, 2025. Except for the above changes, the rest of the original announcement remains valid. Gansu Power Investment Zhangye Power Generation Co., Ltd. April 15, 2025