Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement.

(a sino-foreign joint stock limited company incorporated in the People’s Republic of ) (Stock Code: 00991)

OVERSEAS REGULATORY ANNOUNCEMENT ANNOUNCEMENT ON POWER GENERATION FOR THE FIRST THREE QUARTERS OF 2020

SPECIAL NOTICE

The board of directors and all directors of the Company warrant that there are no false representations and misleading statements contained in, or material omissions from this announcement, and severally and jointly accept the responsibility for the truthfulness, accuracy and completeness of the contents of this announcement.

This announcement is made pursuant to Rule 13.10B of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited.

Datang International Power Generation Co., Ltd. (the “Company”) announces that, according to the Company’s preliminary statistics, as of 30 September 2020, the total power generation of the Company and its subsidiaries amounted to approximately 200.6796 billion kWh, representing an increase of approximately 2.30% on a year-on-year basis, and total on-grid power generation amounted to approximately 188.0351 billion kWh, representing an increase of approximately 1.49% on a year-on-year basis.

The major reasons for the increase in power generation of the Company are as follows:

1. The national overall power consumption increased year-on-year as the domestic epidemic has been effectively controlled;

2. The increase of new power generating units in parts of the areas where the Company is located; and

3. Owing to the continuous enhancement of new energy consumption in parts of the areas where the Company is located, the power curtailment situation was improved significantly.

- 1 - As of 30 September 2020, the average on-grid tariff of the Company was RMB363.87 per MWh (inclusive of tax).

Details of the power generation of the Company and its subsidiaries are set out as below:

Power generation On-grid power for the first generation for three quarters of the first three 2020 quarters of 2020 Area Category Company name (billion kWh) Growth (billion kWh) Growth , Thermal Power Gao Jing Thermal Power Plant 3.7739 -14.08% 3.6805 -13.97% & (Gas-fired) Thermal Power Dou He Power Plant 2.7111 -37.39% 2.4664 -37.71% Thermal Power Xia Hua Yuan Power Plant 0.6016 4.84% 0.5446 4.87% Thermal Power Zhang Jia Kou Power Plant 8.5299 -16.79% 7.8096 -17.33% Thermal Power, Tianjin Datang International Panshan Power 3.7250 1.18% 3.4605 1.10% Photovoltaic Power Generation Company Limited Thermal Power Datang International Tuoketuo Power 11.5876 -16.26% 10.8187 -16.27% Generation Company Limited Thermal Power Inner Mongolia Datang International Tuoketuo No. 2 8.5608 -20.51% 8.0373 -20.62% Power Generation Company Limited Thermal Power Hebei Datang International Tangshan Thermal Power 1.7226 -20.86% 1.5884 -21.44% Company Limited Thermal Power Datang International Shentou Power 3.1382 28.66% 2.8865 28.66% Generation Company Limited Thermal Power Hebei Datang International Wangtan Power 4.0171 -10.06% 3.7568 -10.20% Generation Company Limited Thermal Power Hebei Datang International Fengrun Thermal Power 2.0058 -10.40% 1.8438 -11.06% Company Limited Thermal Power Hebei Datang International Zhangjiakou Thermal 2.1621 -12.18% 2.0223 -12.31% Power Company Limited Thermal Power Hebei Datang International Qian’an Thermal Power 0.5082 76.64% 0.4605 76.10% Company Limited Wind Power Hebei Datang International Renewable Power 1.1840 49.04% 1.1523 47.64% Company Limited Thermal Power Hebei Datang International Tangshan Beijiao Thermal 1.5759 / 1.4711 / Power Company Limited

- 2 - Power generation On-grid power for the first generation for three quarters of the first three 2020 quarters of 2020 Area Category Company name (billion kWh) Growth (billion kWh) Growth Shanxi Thermal Power Shanxi Datang International Yungang Thermal Power 3.5033 -4.76% 3.1870 -4.62% Company Limited Thermal Power Shanxi Datang International Thermal Power 2.0547 -6.75% 1.8922 -6.91% Company Limited Wind Power Shanxi Datang International Zuoyun Wind Power 0.0960 10.98% 0.0950 11.50% Company Limited Wind Power Shanxi Datang International Yingxian Wind Power 0.0703 -1.95% 0.0692 -1.98% Company Limited Guangdong Thermal Power Guangdong Datang International Chaozhou Power 11.2704 3.69% 10.6907 3.68% Generation Company Limited Thermal Power Datang Baochang Gas Power Generation 0.6085 -20.11% 0.5935 -20.09% (Gas-fired) Company Limited Thermal Power Guangdong Datang International Zhaoqing Thermal 2.3475 102.06% 2.3015 102.29% (Gas-fired) Power Company Limited Thermal Power Guangdong Datang International Leizhou Power 5.2330 / 4.9792 / Generation Company Limited Jiangsu Thermal Power, Jiangsu Datang International Lvsigang Power 9.1740 3.22% 8.6354 3.08% Photovoltaic Power Generation Company Limited Thermal Power Jiangsu Datang International Jintan Thermal Power 2.4919 20.69% 2.4394 20.71% (Gas-fired) Company Limited Thermal Power Jiangsu Datang International Rugao Thermal Power 0.0611 50.12% 0.0474 82.31% Company Limited Fujian Thermal Power Fujian Datang International Ningde Power Generation 9.4146 16.72% 8.9137 16.77% Company Limited Wind Power Fujian Datang International Renewable Power 0.1975 -13.49% 0.1921 -13.62% Company Limited

- 3 - Power generation On-grid power for the first generation for three quarters of the first three 2020 quarters of 2020 Area Category Company name (billion kWh) Growth (billion kWh) Growth Zhejiang Thermal Power Zhejiang Datang Wushashan Power Generation 8.4421 -1.56% 7.9822 -1.82% Company Limited Thermal Power Zhejiang Datang International Shaoxing Jiangbin 0.8287 -25.76% 0.8108 -25.82% (Gas-fired), Thermal Power Company Limited Photovoltaic Power Thermal Power Zhejiang Datang International Jiangshan Xincheng 0.2357 64.71% 0.2305 64.88% (Gas-fired), Thermal Power Company Limited Photovoltaic Power Wind Power, Zhejiang Datang International Renewable Power 0.0894 7.07% 0.0880 7.71% Photovoltaic Power Company Limited Photovoltaic Power Wencheng Datang Renewable Power Company 0.0095 / 0.0094 / Limited Wind Power, Ningxia Datang International Wind 0.1398 6.96% 0.1365 7.73% Photovoltaic Power Power Company Limited Wind Power, Ningxia Datang International Hongsibao New Energy 0.2774 40.60% 0.2687 40.61% Photovoltaic Power Company Limited Liaoning Thermal Power Liaoning Datang International Jinzhou Thermal 1.8829 -1.71% 1.7092 -2.10% Power Company Limited Wind Power, Liaoning Datang International Renewable Power 1.3367 19.50% 1.3205 19.46% Photovoltaic Power Company Limited Thermal Power Liaoning Datang International Shendong Thermal 1.9752 14.65% 1.8339 14.71% Power Company Limited Thermal Power Liaoning Datang International Huludao Thermal 1.0091 / 0.9359 / Power Company Limited Yunnan Hydropower, Yunnan Datang International Electric Power 6.1613 21.03% 5.9097 19.16% Photovoltaic Power Generation Company Limited Jiangxi Thermal Power Jiangxi Datang International Power 8.3886 -1.59% 8.0054 -1.83% Generation Company Limited Thermal Power Jiangxi Datang International Xinyu Power Generation 0.5123 14.12% 0.4640 13.75% Company Limited Wind Power Jiangxi Datang International Renewable Power 0.7223 25.46% 0.7051 25.57% Company Limited

- 4 - Power generation On-grid power for the first generation for three quarters of the first three 2020 quarters of 2020 Area Category Company name (billion kWh) Growth (billion kWh) Growth Inner Thermal Power Inner Mongolia Datang International Thermal 2.8110 13.72% 1.0162 -55.18% Mongolia Power Company Limited Hydropower Inner Mongolia Datang International Haibowan Water 0.4292 -9.91% 0.4254 -9.93% Conservancy Hub Development Company Limited Wind Power, Inner Mongolia Datang International Renewable 0.4287 -1.74% 0.4151 -1.45% Photovoltaic Power Power Company Limited Thermal Power Chongqing Datang International Shizhu Power 1.2720 190.94% 1.1839 191.89% Generation Company Limited Hydropower Chongqing Datang International Pengshui 5.4214 7.49% 5.4048 7.50% Hydropower Development Company Limited Hydropower Chongqing Datang International Wulong Hydropower 2.3905 3.48% 2.3703 3.47% Development Company Limited Hydropower Yuneng (Group) Company Limited 1.4041 20.31% 1.3945 20.29% Wind Power Chongqing Datang International Wulong Xingshun 0.0634 7.28% 0.0613 6.98% Wind Power Company Limited Sichuan Hydropower Sichuan Jinkang Electric Power Development 1.2421 6.99% 1.2211 6.92% Company Limited Hydropower Sichuan Datang International Ganzi Hydropower 10.0828 24.34% 10.0331 24.36% Development Company Limited Photovoltaic Power Sichuan Datang International New Energy Co., Ltd. 0.0575 -10.16% 0.0561 -10.67%

- 5 - Power generation On-grid power for the first generation for three quarters of the first three 2020 quarters of 2020 Area Category Company name (billion kWh) Growth (billion kWh) Growth Qinghai Hydropower Qinghai Datang International Zhiganglaka 0.7375 12.08% 0.7303 12.10% Hydropower Development Company Limited Photovoltaic Power Qinghai Datang International Gonghe Photovoltaic 0.0775 -1.65% 0.0770 -2.04% Power Generation Company Limited Photovoltaic Power Qinghai Datang International Golmud Photovoltaic 0.1242 4.19% 0.1228 3.80% Power Generation Company Limited Wind Power Datang International Mangya Renewable Energy Co., 0.1055 36.13% 0.1031 45.62% Ltd. Wind Power Datang International Dachaidan Renewable Energy 0.0752 / 0.0735 / Co., Ltd. Wind Power Datang International Dulan Renewable Energy Co., 0.0480 / 0.0470 / Ltd. Anhui Thermal Power Datang Luohe Power Plant 0.7554 -20.60% 0.7077 -20.80% Thermal Power Datang Huaibei Power Plant 4.6989 -0.86% 4.4817 -0.51% Hydropower Datang Chencun Hydropower Plant 0.4319 -2.48% 0.4259 -2.56% Thermal Power Anhui Huainan Luoneng Power Generation Co., Ltd 5.6874 -16.64% 5.4128 -16.62% Thermal Power Ma’ Dangtu Power Generation Co., Ltd. 4.0445 -15.46% 3.8765 -15.53% Thermal Power Huainan Tianjia’an Power Plant of Anhui Electric 2.1479 -6.07% 2.0255 -5.87% Power Co., Ltd. Biomass Datang Anqing Biomass Power Generation Co., Ltd. 0 / 0 /

- 6 - Power generation On-grid power for the first generation for three quarters of the first three 2020 quarters of 2020 Area Category Company name (billion kWh) Growth (billion kWh) Growth Hebei Thermal Power Matou Thermal Power Branch of Datang Hebei 2.1986 -17.94% 2.0120 -18.01% Power Generation Co., Ltd. Thermal Power Datang Baoding Thermal Power Plant 1.4369 -7.27% 1.2355 -6.80% Hydropower, Datang Wangkuai Hydropower Plant 0.0282 -25.79% 0.0274 -26.34% Photovoltaic Power Wind Power Datang Hebei Renewable Energy (Zhangbei) Co., 0.2121 20.24% 0.2093 20.01% Ltd. Thermal Power Datang Qingyuan Thermal Power Co., Ltd. 2.2892 -12.70% 2.0850 -12.88% Thermal Power Datang Wu’an Power Generation Co., Ltd. 2.0048 -9.65% 1.8389 -9.66% Photovoltaic Power Datang Wuyuan Renewable Energy Co., Ltd. 0.0247 -0.40% 0.0242 -2.02% Wind Power, Datang Wulate Houqi Renewable Energy Co., Ltd. 0.0790 -0.13% 0.0763 -2.30% Photovoltaic Power Photovoltaic Power Xingtang Branch of Datang Hebei Power Generation 0.0030 -3.23% 0.0030 -3.23% Co., Ltd. Photovoltaic Power Zanhuang Branch of Datang Hebei Power Generation 0.0016 -5.88% 0.0016 -5.88% Co., Ltd.

- 7 - Power generation On-grid power for the first generation for three quarters of the first three 2020 quarters of 2020 Area Category Company name (billion kWh) Growth (billion kWh) Growth Heilongjiang Thermal Power Datang Qitaihe Power Generation Company 4.9717 2.12% 4.6455 2.32% Thermal Power Datang Jixi Thermal Power Co., Ltd. 0.8363 2.22% 0.7598 2.55% Thermal Power Datang Shuangyashan Thermal Power Co., Ltd. 1.2350 -0.05% 1.1185 -0.16% Thermal Power Datang Jixi Second Thermal Power Co., Ltd. 1.9943 -4.05% 1.8549 -4.25% Thermal Power First Thermal Power Plant of Datang 2.0472 -1.95% 1.7246 -5.28% Heilongjiang Power Generation Co., Ltd. Hydropower, Wind Datang Heilongjiang Renewable Power Development 0.2494 6.13% 0.2453 6.14% Power Co., Ltd. Thermal Power Datang Suihua Power Generation Co., Ltd. 2.1931 -4.44% 2.0625 -4.42% Total 200.6796 2.30% 188.0351 1.49%

Note: Inner Mongolia Datang International Renewable Resource Development Company Limited, a wholly- owned subsidiary of the Company, has completed the absorption and merger with Inner Mongolia Datang International Hohhot Thermal Power Generation Company Limited (“Hohhot Thermal Power Generation Company”), which was renamed as Inner Mongolia Datang International Hohhot Aluminum and Power Co., Ltd. (“Hohhot Aluminum and Power Company”) in July 2020. Two 300MW coal-fired power generating units of the former Hohhot Thermal Power Generation Company were operated by themselves as the power sub-station of Hohhot Aluminum and Power Company, and the power generated was for their own use.

By order of the Board Jiang Jinming Company Secretary

Beijing, the PRC, 23 October 2020

As at the date of this announcement, the directors of the Company are:

Chen Feihu, Qu Bo, Liang Yongpan, Ying Xuejun, Zhu Shaowen, Cao Xin, Zhao Xianguo, Zhang Ping, Jin Shengxiang, Liu Jizhen*, Luo Zhongwei*, Liu Huangsong*, Jiang Fuxiu*, Niu Dongxiao*

* Independent non-executive directors

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