Sponsorship Letter for the 2025 A-Share Issuance and Listing of China National Materials Technology Co., Ltd.

Sponsorship Letter for the 2025 A-Share Issuance and Listing of China National Materials Technology Co., Ltd.

China National Materials Technology Co., Ltd. (hereinafter referred to as "China National Materials Technology," "the issuer," or "the company") is applying for the issuance of A-shares to specific investors and listing on the main board, in accordance with relevant laws and regulations including the Company Law, Securities Law, and the Shenzhen Stock Exchange's rules for the issuance and listing of securities by listed companies. Huatai United Securities Co., Ltd. (hereinafter referred to as "Huatai United Securities" or "the sponsor") is acting as the sponsor for this issuance, with Feng Xu and Liao Jun as the designated sponsoring representatives, and hereby issues this sponsorship letter.

The sponsor Huatai United Securities, along with sponsoring representatives Feng Xu and Liao Jun, commits to acting in good faith and with due diligence in accordance with the Company Law, Securities Law, and other relevant laws and regulations, as well as the rules set forth by the China Securities Regulatory Commission and the Shenzhen Stock Exchange. They guarantee the authenticity, accuracy, and completeness of the documents provided.

Table of Contents

1. Basic Information on the Securities Issuance
   • Introduction of the Sponsor's Staff
   • Overview of the Issuer
   • Relationships and Business Transactions between the Sponsor and the Issuer
   • Internal Review Procedures and Opinions of the Sponsor
2. Commitments of the Sponsor and Related Personnel
3. Recommendations for the Securities Issuance
   • Conclusion of Recommendations
   • Explanation of Decision-Making Procedures
   • Compliance with Relevant Regulations
   • Reasonableness of Immediate Return Dilution and Related Commitments
   • Opinions on Risk Prevention in Investment Banking
   • Major Risk Warnings for the Issuer
   • Evaluation of the Issuer's Development Prospects

Basic Information on the Securities Issuance

Introduction of the Sponsor's Staff

1. Sponsoring Representatives

   • Feng Xu: Works in the investment banking division of Huatai United Securities. He has participated in IPOs, refinancing, or mergers and acquisitions for companies such as ShouLve Hotel, Digital Science and Technology, Dongfeng Motor, China Energy Engineering, and Qizhi Technology.
   • Liao Jun: Also works in the investment banking division of Huatai United Securities. He has led or participated in projects for Chengdu Huawi, Agricultural Development Seed Industry, Yuyuan New Materials, North Glass, China Mobile, China Telecom, ShouLve Hotel, and others.

2. Project Coordinator

   • Li Qiuyan: Works in the investment banking division of Huatai United Securities and has participated in projects including the specific issuance of shares by Agricultural Development Seed Industry and Yuyuan New Materials.

3. Other Project Team Members

   • Other members involved in this sponsorship include Wu Guo, Zhen Qing, Zhou Yancheng, and Bie Jiarui.

Overview of the Issuer

1. Company Name: China National Materials Technology Co., Ltd.

2. Registered Address: No. 99 Tongtian Road, Jiangning Science Park, Nanjing, Jiangsu Province.

3. Establishment Date: December 28, 2001.

4. Registered Capital: 1,678,123,584 RMB.

5. Legal Representative: Huang Zaiman.

6. Contact Information: 010-88437909.

7. Business Scope: Includes construction engineering, intelligent system design, new materials technology research and development, manufacturing and sales of fiberglass and products, and various technical services.

8. Type of Securities Issuance: Domestic listed ordinary shares (A-shares) on the main board of the Shenzhen Stock Exchange.

9. Latest Shareholding Structure: As of December 31, 2025, China National Materials holds 60.24% of the shares, making it the controlling shareholder, with China National Building Materials Group as the actual controller.

10. Top Ten Shareholders: As of December 31, 2025, the total share capital of the issuer is 1,678,123,584 shares, all of which are unrestricted shares. The top ten shareholders are as follows: