| Huaneng Guilin Gas Distributed Energy | 80.00 | - | - | |
| Huaneng International Power Co Ltd Shantou Power Plant | 100.00 | - | - | |
| Tianjin Huaneng Yangliuqing Co-Generation | 55.00 | - | - | |
| Huaneng Power International Inc Yingkou Power Plant | 100.00 | - | - | |
| Huaneng Yingcheng Thermal Power Co Ltd | 100.00 | - | - | |
| Huaneng International Power Co Ltd Yuhuan Power Plant | 100.00 | - | - | |
| Huaneng Xindian Power Generation | 95.00 | - | - | |
| Hebei Hanfeng POWER Generation | 40.00 | - | - | |
| Shanxi Branch of Huaneng International Power | 100.00 | - | - | |
| Huaneng Heilongjiang Power Generation | 100.00 | - | - | |
| Huaneng Jilin Power Generation | 100.00 | - | - | |
| Huaneng Weihai Power Generation | 60.00 | - | - | |
| Huaneng Shanyin Power Generation | 51.00 | - | - | |
| Huaneng International Power Co Ltd Dandong Power Plant | 100.00 | - | - | |
| Huaneng International Power Co Ltd Jining Power Plant | 100.00 | - | - | |
| Huaneng International Power Co Ltd Dalian Power Plant | 100.00 | - | - | |
| Huaneng Tongxiang Gas Turbine Thermal Power Co Ltd | 95.00 | - | - | |
| Huaneng Anyang Thermal Power Co Ltd | 51.00 | - | - | |
| Huaneng International Power Co Ltd Changxing Power Plant | 100.00 | - | - | |
| Huaneng Beijing Thermal Electricity | 41.00 | - | - | |
| Huaneng Chongqing Luohuang Power Generation | 60.00 | - | - | |
| Huaneng Chaohu Power Generation | 60.00 | - | - | |
| Huaneng International Power Co Ltd Yueyang Power Plant | 100.00 | - | - | |
| Huaneng Dezhou Power Plant | 100.00 | - | - | |
| Huaneng Yingkou Thermal Power Co Ltd | 100.00 | - | - | |
| Huaneng Yunnan Diandong Energy | 100.00 | - | - | |
| Shanxi Huaneng Yushe Electric Power Co Ltd | 100.00 | - | - | |
| Huaneng Chongqing Liangjiang Gas Turbine Power Generation | 75.00 | - | - | |
| Huaneng Zhanhua Thermal Power Co Ltd | 100.00 | - | - | |
| Huaneng Hunan Yueyang Power Generation | 55.00 | - | - | |
| Huaneng (Dalian) Thermal Power Co Ltd | 100.00 | - | - | |
| Huaneng (Guangdong) Energy Development | 100.00 | - | - | |
| Huaneng Zuoquan Coal&Power | 80.00 | - | - | |
| Huaneng Luoyang Thermal Power Co Ltd | 80.00 | - | - | |
| Huaneng Yingkou Xianrendao Thermal Power Co Ltd | 100.00 | - | - | |
| Sichuan Huaneng Hydropower Development | 49.00 | - | - | |
| Huaneng Power International, Inc. Rizhao power plant | 100.00 | - | - | |
| Huaneng International Power Co Ltd Shanghai Shidongkou Second Power Plant | 100.00 | - | - | |
| Huaneng Shandong Power Generation | 80.00 | - | - | |
| Huaneng Shanghai Gas Turbine Power Generation | 70.00 | - | - | |
| Huaneng (Fujian) Energy Development | 100.00 | - | - | |
| Huaneng Power International Inc Jinggangshan Power Plant | 100.00 | - | - | |
| Huaneng Lingang (Tianjin) Gas Thermal Power Co Ltd | 100.00 | - | - | |
| Yunnan Diandong Yuwang Energy Co Ltd | 100.00 | - | - | |
| Huaneng Ruijin Power Generation | 50.00 | - | - | |
| Huaneng Wuhan Power Generation | 75.00 | - | - | |
| Liaoning Puhe Thermal Power Co Ltd | 40.00 | - | - | |
| Huaneng Henan Zhongyuan Gas POWER | 90.00 | - | - | |
| Huaneng Pingliang Power Generation | 65.00 | - | - | |
| Huaneng Mianchi Thermal Power Co Ltd | 60.00 | - | - | |
| Huaneng Hainan Power Inc | 91.80 | - | - | |
| Huaneng Anyuan Power Generation | 100.00 | - | - | |
| Shenzhen City Energy Group | 25.00 | - | - | |
| Huaneng Power International, Inc Shanghai Shidongkou No.1 Power Plant | 100.00 | - | - | |
| Huaneng Qinbei Power Generation | 60.00 | - | - | |
| Huaneng Jingmen Thermal Power Co Ltd | 100.00 | - | - | |
| Shenzhen Energy Group Co Ltd | 25.02 | - | - | |
| Huaneng Tianjin Igcc Co Ltd | 11.82 | - | - | |
| Huaneng Qingdao Thermal Power Co Ltd | 100.00 | - | - | |
| Tuas Power | 100.00 | - | - | |
| Huaneng International Power Jiangsu Energy Development Co Ltd | 100.00 | - | - | |
