Simplified Report on Change of Equity (China Systems)

Hebei Gongda Keya Technology Group Co., Ltd.

Simplified Report on Change of Equity

Listed Company Name: Hebei Gongda Keya Technology Group Co., Ltd.

Stock Exchange: Shenzhen Stock Exchange

Stock Abbreviation: Gongda Keya

Stock Code: 301197

Information Disclosure Obligor: China Electronics System Technology Co., Ltd.

Domicile and Contact Address: No. 8 Xiaotun Road, Fengtai District, Beijing

Nature of Equity Change: Reduction of shares (agreement transfer)

Signing Date: July 13, 2026

Declaration of Information Disclosure Obligor

1. The Information Disclosure Obligor has prepared this report in accordance with the Company Law of the People's Republic of China, the Securities Law of the People's Republic of China, the Administrative Measures for the Takeover of Listed Companies, and the Contents and Formats of Information Disclosure by Companies Offering Securities to the Public No. 15 — Report on Change of Equity.

2. The Information Disclosure Obligor has obtained the necessary authorization and approval for signing this report, and its performance does not violate or conflict with any terms in the articles of association or internal rules of the Information Disclosure Obligor.

3. In accordance with the Securities Law of the People's Republic of China and the Administrative Measures for the Takeover of Listed Companies, this report has fully disclosed the changes in the equity held by the Information Disclosure Obligor in Hebei Gongda Keya Technology Group Co., Ltd. As of the signing date of this report, except for the information disclosed herein, the Information Disclosure Obligor has not increased or decreased its equity in Hebei Gongda Keya Technology Group Co., Ltd. through any other means.

4. The implementation of this equity change is subject to the final approval of the superior competent state-owned assets supervision and administration authority of China Electronics System Technology Co., Ltd., and requires compliance confirmation from the Shenzhen Stock Exchange regarding this share transfer before the agreement transfer procedures can be processed at the Shenzhen Branch of China Securities Depository and Clearing Corporation. There is still some uncertainty as to whether the aforementioned approval procedures can be passed.

5. This equity change is based on the information contained in this report. The Information Disclosure Obligor has not entrusted or authorized any other person to provide information not listed in this report or to make any interpretation or explanation of this report.

6. The Information Disclosure Obligor warrants that this report does not contain any false records, misleading statements, or major omissions, and assumes individual and joint legal liability for its authenticity, accuracy, and completeness.

Table of Contents

Definitions: 4

Section I: Introduction to Information Disclosure Obligor: 5

1. Basic Information of the Information Disclosure Obligor: 5

2. Directors and Key Responsible Persons of the Information Disclosure Obligor: 6

3. Equity Held by the Information Disclosure Obligor in Other Domestic or Overseas Listed Companies Reaching or Exceeding 5% of the Issued Shares: 6

Section II: Purpose of Equity Change: 7

1. Purpose of the Information Disclosure Obligor's Equity Change: 7

2. Shareholding Plan of the Information Disclosure Obligor for the Next 12 Months: 7

Section III: Method of Equity Change: 8

1. Method of This Equity Change: 8

2. Specific Details of This Equity Change: 8

3. Basic Information on Agreement Transfer: 9

Section IV: Trading of Company Shares in the Previous Six Months: 12

Section V: Other Major Matters: 13

Section VI: Declaration of Information Disclosure Obligor: 14

Section VII: Documents Available for Inspection: 15

1. Documents Available for Inspection: 15

2. Location of Documents Available for Inspection: 15

Definitions

Unless otherwise specified, the following abbreviations are defined as follows in this report: