Simplified Report on Change of Equity

Guocheng Mining Co., Ltd. Simplified Report on Change of Equity

Name of Listed Company: Guocheng Mining Co., Ltd. Stock Exchange: Shenzhen Stock Exchange Stock Abbreviation: Guocheng Mining Stock Code: 000688

Information Disclosure Obligor 1: Guocheng Holding Group Co., Ltd. Domicile: 2002-2, Building 1, Green Valley, Green Valley Information Industry Park, No. 368 Chengbei Street, Liandu District, Lishui City, Zhejiang Province Communication Address: 11th Floor, Building 19, Zone 16, No. 188 South Fourth Ring West Road, Fengtai District, Beijing

Information Disclosure Obligor 2: Gansu Jianxin Industrial Group Co., Ltd. Domicile: Binhe Road, Chengguan, Hui County, Longnan City, Gansu Province Communication Address: 11th Floor, Building 19, Zone 16, No. 188 South Fourth Ring West Road, Fengtai District, Beijing

Nature of Equity Change: Decrease Date of Signing: June 22, 2026

Declaration of Information Disclosure Obligors

1. The information disclosure obligors have 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, the Content and Format Standards for Information Disclosure by Companies Offering Securities to the Public No. 15—Report on Change of Equity, and other relevant laws and regulations.

2. The signing of this report by the information disclosure obligors has obtained the necessary authorization and approval, and its performance does not violate or conflict with any terms in the articles of association or internal rules of the information disclosure obligors.

3. In accordance with the Company Law, the Securities Law, the Administrative Measures for the Takeover of Listed Companies, and Standard No. 15, this report has fully disclosed the changes in the shares held by the information disclosure obligors in Guocheng Mining Co., Ltd. As of the date of signing this report, except for the information disclosed herein, the aforementioned information disclosure obligors have not increased or decreased their equity in Guocheng Mining Co., Ltd. through any other means.

4. This change in equity is based on the information contained in this report. The information disclosure obligors have not entrusted or authorized any other person to provide information not contained in this report or to make any explanations or statements regarding this report.

5. The information disclosure obligors promise that this report does not contain any false records, misleading statements, or major omissions, and assume individual and joint legal responsibility for its authenticity, accuracy, and completeness.

Table of Contents

Section I Definitions Section II Introduction to Information Disclosure Obligors Section III Purpose of Equity Change and Shareholding Plan Section IV Method of Equity Change Section V Trading of Listed Shares in the Previous Six Months Section VI Other Important Matters Section VII Documents Available for Inspection

Section I Definitions

In this report, unless the context otherwise requires, the following terms have the following meanings: