Stock code: 000539，200539 Stock Abbreviation: Yue Dian Li A，Yue Dian Li B Announcement No.:2026-53

Guangdong Electric power Development Co., Ltd.

Summary of the Semi-Annual Report 2026

I. Important notes

This summary of the Semi-Annual Report is quoted out of the full text of the Semi-Annual Report. Investors desirous to understand entirely the Company's operation results, financial position and future development planning are advised to carefully read the full text of the Semi-Annual Report which is published in the medium designated by CSRC.

Directors other than the following ones have attended the Board meeting to review the Summary- annual report.

Non-standard auditor’s opinion

□ Applicable √Not applicable

Preliminary plan for profit distribution to the common shareholders or turning the capital reserve into the share capital for the reporting period, which has been reviewed and approved at the board meeting □ Applicable √Not applicable

The company will distribute no cash dividends or bonus shares and has no reserve capitalization plan. The preference share profit distribution pre-plan approved by the Board of Directors

□ Applicable √Not applicable

II. Basic information about the company

1. Company profile

2. Major accounting data and financial indicators

May the Company make retroactive adjustment or restatement of the accounting data of the previous years □Yes No

3. Shareholders and shareholding

In RMB

Information of shareholders holding more than 5% of the shares, the top 10 shareholders and the top 10 shareholders of unrestricted tradable shares participating in the lending of shares in securities lending and borrowing business

□ Applicable √ Not applicable

The top 10 shareholders and the top 10 shareholders of unrestricted tradable shares have changed compared with the previous period due to the securities lending/returning,

□ Applicable √ Not applicable

4. Change of the controlling shareholder or the actual controller

Change of the controlling shareholder in the reporting period

□ Applicable √ Not Applicable

There was no any change of the controlling shareholder of the Company in the reporting period.

Change of the actual controller in the reporting period

□ Applicable √ Not applicable

There was no any change of the actual controller of the Company in the reporting period.

5.Number of preference shareholders and shareholdings of top 10 of them

□ Applicable √ Not applicable

No preference shareholders in the reporting period

6. Bonds existing on the approval date of semi-annual report

√Applicable□ Not applicable

（1）Basic information of corporate bonds

（2） Financial indicators as of the end of the reporting period

In RMB 10,000

III. Significant events

In the first half of 2026, electricity demand in Guangdong Province continued to rise. From January to June, the total social electricity consumption in Guangdong Province reached 471.483 billion kWh, representing a year-on-year increase of 9.1%; among which, industrial electricity consumption amounted to 271.229 billion kWh, accounting for approximately 57.5%, and electricity consumption by the secondary industry maintained relatively rapid growth. During the reporting period, Benefiting from the commissioning of new coal-fired power projects, the Company's cumulative grid-connected electricity volume on a consolidated basis amounted to 65.714 billion kWh, a year-on-year increase of 23.14%.

According to data from the Guangdong Power Trading Center, the annual bilateral negotiation transaction volume in the Guangdong electricity market for 2026 reached 358.968 billion kWh, with an average transaction price of RMB 372.14/MWh. In the first half of 2026, the Company's average on-grid tariff on a consolidated basis was RMB 445.90 yuan/ Thousand KWh, a YOY decrease of 34.11 yuan/Thousand kWh, a decrease of 7.11%; The operating income was 26,333.09 million yuan, a YOY increase of 3,191.65 million yuan or an increase of 13.79%.

In the first half of 2026, thanks to the commissioning of new coal-fired power projects and improvements in the generation efficiency of existing units, the Company’s electricity supply to the grid increased by 23.14 per cent year-on-year. However, due to the continued decline in the comprehensive grid-connected electricity tariff, a year-on-year rise in fuel costs, and lower-than-expected utilisation hours for new energy projects — coupled with the impact of increased expenses such as depreciation, labour costs and interest on newly commissioned units—the gross profit margin of the Company’s power generation business continued to narrow. During the reporting period, the Company as a whole recorded a net profit attributable to shareholders of – 545.78 million yuan, representing a loss compared with the previous year. Specifically, the coal-fired power business recorded a net profit attributable to shareholders of –544.90 million yuan; the gas-fired power business recorded a net profit attributable to shareholders of –256.55 million yuan; the hydropower business recorded a net profit attributable to shareholders of 6.03 million yuan; and the new energy business recorded a net profit attributable to shareholders of –97.89 million yuan; the Company’s head office investment operations recorded a net profit attributable to shareholders of 194.64 million yuan

As of June 2026, the Company had a total installed capacity of approximately 8,787.3 MW in new energy sources such as wind power and photovoltaic power, of which approximately 2,201.5 MW was offshore wind power, approximately 1,693.4 MW was onshore wind power, and approximately 4,892.5 MW was photovoltaic power generation. In the first half of 2026, There were 300 MW of wind power projects under construction at Guangdong Huilai Shibeishan and Shanxi Yuncheng, and approximately 500 MW of photovoltaic projects under construction in Hainan, Guangdong and other regions in aggregate. In addition, 1,790 MW of projects had completed decision-making and were proposed for construction. In the future, the Company will continue to actively grasp the general development trend of accelerating energy transformation under the goals of "carbon peaking" and "carbon neutrality", implement the specific deployment of "1310" by the Guangdong Provincial Committee of the Communist Party of China, further expand high-quality new energy project resources, and build an ecologically civilized power generation enterprise.