HUANENG POWER (00902) announced that Huaneng Power International, Inc.'s 2025 technology innovation perpetual corporate bonds (third tranche) publicly issued to professional investors (hereinafter referred to as "the current bonds") will have an issuance scale not exceeding RMB 30 billion (including RMB 30 billion). The issuer and lead underwriter conducted coupon rate inquiries to professional institutional investors offline on September 8, 2025. Based on the bookbuilding results from the offline inquiries to professional institutional investors, after thorough consultation and prudent judgment between the issuer and lead underwriter, the final coupon rate for the current bond variety one (bond name: 25HPI3YK, code: 243724.SH) was set at 2.04%, and the coupon rate for the current bond variety two (bond name: 25HPI4YK, code: 243725.SH) was set at 2.48%.