CITIC Securities Co., Ltd. on the Sponsorship for Sinolong New Materials Co., Ltd.'s 2025 Convertible Bond Issuance

Statement

CITIC Securities Co., Ltd. accepts the commission from Sinolong New Materials Co., Ltd. to act as the sponsor for the issuance of convertible bonds to unspecified investors in 2025, and issues this sponsorship letter for the issuance. The sponsor and designated representatives will issue the sponsorship letter 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 Registration of Securities Issuance by Listed Companies, the Management Measures for the Sponsorship of Securities Issuance and Listing, and other relevant laws and regulations, as well as the provisions of the China Securities Regulatory Commission and the Shenzhen Stock Exchange, with honesty, diligence, and strict adherence to the established business rules, industry practices, and ethical standards. The sponsor guarantees the authenticity, accuracy, and completeness of the documents issued. If the documents prepared and issued by the sponsor for this issuance contain false records, misleading statements, or major omissions, resulting in losses to investors, the sponsor will compensate the investors according to the law. All abbreviations and definitions in this document, unless otherwise specified, are consistent with the "Prospectus for the Issuance of Convertible Bonds by Sinolong New Materials Co., Ltd. in 2025 to Unspecified Investors."

Table of Contents

1. Basic Information on the Securities Issuance
   • Name of the Sponsor
   • Designated Responsible Representatives
   • Co-organizers and Other Project Team Members
   • Basic Information of the Issuer
   • Relationship Between the Sponsor and the Issuer
   • Internal Review Procedures and Opinions of the Sponsor
2. Commitments of the Sponsor
3. Recommendations of the Sponsor Regarding the Securities Issuance
4. Relationship Between the Sponsor and the Issuer
5. Internal Review Procedures and Opinions of the Sponsor
6. Risk Warnings Related to the Issuer
7. Financial Data and Indicators
8. Conclusion

Section 1: Basic Information on the Securities Issuance

1. Name of the Sponsor

CITIC Securities Co., Ltd.