CITIC Securities Company Limited's Issuance Sponsorship Letter for Jiangsu Sino-High (China) Co., Ltd.'s 2026 Annual Issuance of A-Shares to Specific Targets

Statement

CITIC Securities Company Limited (hereinafter referred to as "CITIC Securities" or "Sponsor") has accepted the engagement by Jiangsu Sino-High (China) Co., Ltd. (hereinafter referred to as "Sino-High", "Issuer", or "Company") to act as the sponsor for its 2026 annual issuance of A-shares to specific targets.

CITIC Securities and its sponsoring representatives, in accordance with the "Company Law of the People's Republic of China", "Securities Law of the People's Republic of China", "Administrative Measures for the Registration of Securities Issuance by Listed Companies", "Administrative Measures for the Sponsorship of Securities Issuance and Listing", and other relevant laws, regulations, and provisions of the China Securities Regulatory Commission (hereinafter "CSRC") and the Shenzhen Stock Exchange (hereinafter "SZSE"), have acted with honesty, trustworthiness, and due diligence. We have issued this issuance sponsorship letter in strict accordance with legally formulated business rules, industry practice standards, and ethical codes, and we guarantee the authenticity, accuracy, and completeness of the documents issued. If the documents produced or issued by the Sponsor for this issuance contain false records, misleading statements, or major omissions, causing losses to investors, the Sponsor will compensate investors for their losses in accordance with the law.

In this issuance sponsorship letter, unless the context otherwise requires, the definitions are the same as those in the "Jiangsu Sino-High (China) Co., Ltd. 2026 Annual Issuance of A-Shares to Specific Targets Prospectus (Declaration Draft)".

Table of Contents

Statement 1

Table of Contents 2

Section 1 Basic Information on This Securities Issuance 3

1. Name of Sponsor 3

2. Sponsoring Representatives Specifically Responsible for This Recommendation 3

3. Project Coordinator and Other Project Team Members 3

4. Type of Securities Issuance by the Issuer Sponsored 3

5. Basic Information of the Issuer 4

6. No Controlling Relationship or Other Major Related Relationship Between This Institution and the Issuer 13

7. Sponsor's Internal Review Procedures and Opinions 14

Section 2 Sponsor's Commitments 16

Section 3 Verification of Paid Engagement of Third-Party Institutions and Individuals 17

Section 4 Sponsor's Recommendation Opinion on This Securities Issuance and Listing 18

1. Decision-making Procedures for This Securities Issuance 18

2. This Securities Issuance Meets the Issuance Conditions Stipulated by the "Company Law" and "Securities Law" 18

3. This Securities Issuance Meets the Issuance Conditions Stipulated by the "Administrative Measures for Registration" 19

4. Relevant Information on the Use of Proceeds from This Issuance 25

5. Major Risks Faced by the Issuer 46

6. Brief Evaluation of the Issuer's Development Prospects 51

Section 1 Basic Information on This Securities Issuance

1. Name of Sponsor

The sponsor for this stock issuance project is CITIC Securities Company Limited.

2. Sponsoring Representatives Specifically Responsible for This Recommendation

Tang Kai, male, currently Vice President of the Global Investment Banking Management Committee of CITIC Securities, Sponsoring Representative. Projects hosted or participated in include: Gaohua Technology IPO, Baocheng Shares IPO, Zhejiang Yide IPO, Gongjin Shares IPO, Luchang Technology IPO, Wuzhou New Spring issuance to specific targets, Zhengdan Shares convertible bonds, Changhong Technology issuance to specific targets, Fuliwang convertible bonds, Longpan Technology convertible bonds. He has strictly complied with the "Administrative Measures for Sponsorship" and other relevant regulations during the practice of sponsorship business, and has a good practice record.