HUANENG POWER INTERNATIONAL, INC. DOMESTIC ON-GRID ELECTRICITY IN THE FIRST QUARTER OF 2022 INCREASED BY 2. 42% YEAR-ON-YEAR

BEIJING, April 14, 2022

According to the preliminary statistics of the Company, for the first quarter of 2022, the Company's total on-grid electricity by power plants within China on consolidated basis amounted to 107.717 billion kWh, representing an increase of 2.42% over the same period of 2021. For the first quarter of 2022, the Company's average on-grid electricity settlement price for its power plants within China was RMB501.96 per MWh, representing an increase of 19.47% over the same period last year. For the first quarter of 2022, the Company's market-based electricity sold ratio was 88.92%, representing an increase of 31.58 percentage points compared to the same period last year.

The increase in the Company's total electricity sold was mainly attributable to:

1. The increase in the Company's electricity was mainly attributable to the significant year-on-year rise in power generation side driven by an increased electricity demand and the heating season in the first quarter of 2022. The power plants of the Company in areas such as Guizhou, Jiangxi, Anhui, Jilin, Hebei, Shandong, Guangxi and Hainan saw a relatively large growth in power generation;
2. The Company continued to promote green and low-carbon transformation, the installed capacity of new energy significantly increased year-on-year, which led to the fast growth in new energy generation year on year.

The on-grid electricity (in billion kWh) of the Company in China are listed below: