Sinolink Securities Co., Ltd. Issuance Sponsorship Letter Regarding Jiangyin Electric Alloy Co., Ltd.'s Issuance of Convertible Corporate Bonds to Unspecified Qualified Investors

Sinolink Securities Co., Ltd. Regarding Jiangyin Electric Alloy Co., Ltd. Issuance of Convertible Corporate Bonds to Unspecified Qualified Investors Issuance Sponsorship Letter

Sponsor (Lead Underwriter)

(No. 95 Dongchenggen Shangjie, Qingyang District, Chengdu)

July 2026

Declaration

This sponsor and its representatives, 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 Administrative Measures for the Sponsorship of Securities Issuance and Listing, and other relevant laws, administrative regulations, and provisions of the China Securities Regulatory Commission, have acted with honesty, trustworthiness, and due diligence. We have strictly followed the legally formulated business rules, industry practice standards, and ethical codes to issue this issuance sponsorship letter, and we guarantee the authenticity, accuracy, and completeness of the documents provided.

Table of Contents

Declaration 1

Table of Contents 2

Definitions 3

Section I Basic Information on This Securities Issuance 4

1. Project Personnel of the Sponsor 4

2. Basic Information of the Issuer 4

3. Interests and Major Business Dealings Between the Sponsor and Its Affiliates and the Issuer and Its Affiliates 5

4. Internal Review Procedures and Opinions of the Sponsor 6

5. Verification of Paid Employment of Third-Party Agencies and Individuals 7

Section II Commitments of the Sponsor 9

Section III Recommendation Opinions on This Securities Issuance 10

1. Sponsorship Conclusion of This Sponsor on the Issuance and Listing of Securities 10

2. Legality of the Decision-Making Procedures for This Securities Issuance 10

3. Compliance of This Securities Issuance with Relevant Laws 10

4. Verification of the Reasonableness of the Issuer's Expected Dilution of Immediate Returns, Remedial Measures, and Related Commitments 19

5. Major Risks Faced by the Issuer 20

6. Evaluation of the Issuer's Development Prospects 23

7. Sponsorship Conclusion of the Sponsor 24

Definitions

In this issuance sponsorship letter, unless the context otherwise requires, the following abbreviations and terms have the following meanings: