Huatai United Securities Co., Ltd. on Nanjing Sanchao New Materials Co., Ltd.'s 2025 A-share Issuance and Listing on the Growth Enterprise Market (Revised Draft)

Issuance Sponsorship Letter

Huatai United Securities Co., Ltd. regarding Nanjing Sanchao New Materials Co., Ltd.'s 2025 A-share issuance to specific investors and listing on the Growth Enterprise Market (Sponsor, Lead Underwriter) (128 Qianhai Shenkang Fund Town, Nanshan Street, Qianhai Shenzhen-Hong Kong Cooperation Zone, Shenzhen) June 2026

Table of Contents

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

1. Basic Information on the Securities Issuance

1.1 Introduction of Sponsor Staff

1. Sponsor Representatives: The specific sponsor representatives responsible for this recommendation are Lv Fuxing and Zhu Hui. Their professional experience includes:

   • Mr. Lv Fuxing, Master’s degree, has led or participated in IPO projects such as Jiangshun Technology (001400), Wavelength Optics (301421), and others.
   • Mr. Zhu Hui, Master’s degree, has been responsible for IPO projects and convertible bond projects for various companies.

2. Project Coordinator: The project coordinator is Ms. Gao Yuge, ACCA, with a Master's degree in Financial Management from Peking University.

3. Other Project Team Members: Other members include Chen Ying, Zhou Mingjie, Qiu Miaosheng, Liu Zixin, and Zong Jiujie.

1.2 Basic Information of the Issuer

1. Company Name: Nanjing Sanchao New Materials Co., Ltd.

2. Registered Address: 77 Zecheng Road, Chunhua Street, Jiangning District, Nanjing.

3. Establishment Date: January 29, 1999.

4. Registered Capital: RMB 114,211,577.

5. Legal Representative: Liu Jingqi.

6. Contact Information: 0511-87357880.

7. Business Scope: Includes research and development of new materials technology, manufacturing and sales of non-metallic mineral products, and various other activities.

8. Type of Securities Issuance: Issuance of A-shares to specific investors and listing on the Growth Enterprise Market.

9. Latest Shareholding Structure: As of the reporting period, the total share capital is 114,211,577 shares, structured as follows:

1. Top Ten Shareholders: As of the reporting period, the top ten shareholders are as follows: