Huaneng Power International, Inc. provided preliminary unaudited earnings guidance for the year ended December 31, 2013. For the period, the annual net profit attributable to the company's shareholders in 2013 based on China Accounting Standards as compared to the same period last year is expected to increase by more than 75%. The annual net profit attributable to the company's shareholders based on the International Financial Reporting Standards will be different due to the adjustments from China Accounting Standards to International Financial Reporting Standards.

The estimated profit increase was primarily due to the decrease in the domestic fuel cost in 2013.