Guotai Haitong Securities Co., Ltd.
Regarding
Suzhou Tianmai Thermal Technology Co., Ltd.
Listing Sponsorship Letter for the Issuance of Convertible Corporate Bonds to Unspecified Qualified Investors on the ChiNext Market
Sponsor (Lead Underwriter)
(No. 618 Shangcheng Road, China (Shanghai) Pilot Free Trade Zone)
August 2026
Statement
Guotai Haitong Securities Co., Ltd. (hereinafter referred to as "Guotai Haitong," "Sponsor," or "this Sponsor") has accepted the engagement by Suzhou Tianmai Thermal Technology Co., Ltd. (hereinafter referred to as "Suzhou Tianmai," "the Company," or "the Issuer") to act as the sponsor for the Company's issuance of convertible corporate bonds to unspecified qualified investors (hereinafter referred to as "this Issuance"). Meng Qinghu and Zhang Xiaowei are the designated sponsor representatives responsible for this recommendation and have issued this listing sponsorship letter for the listing of these convertible bonds.
This Sponsor and the sponsor representatives have acted in accordance with the Company Law of the People's Republic of China, the Securities Law of the People's Republic of China, the Measures for the Administration of Securities Issuance and Listing Sponsorship Business, the Measures for the Administration of Securities Issuance and Listing of Listed Companies (Trial), the Rules Governing the Listing of Stocks on the ChiNext Market of the Shenzhen Stock Exchange, and other relevant laws, administrative regulations, and the provisions of the China Securities Regulatory Commission (hereinafter referred to as "CSRC") and the Shenzhen Stock Exchange. We have acted with honesty, integrity, and due diligence, strictly following established business rules and industry self-regulatory standards to issue this listing sponsorship letter, and we guarantee that the documents provided are true, accurate, and complete.
(Unless otherwise specified in this listing sponsorship letter, relevant terms have the same meanings as those defined in the Prospectus for the Issuance of Convertible Corporate Bonds to Unspecified Qualified Investors by Suzhou Tianmai Thermal Technology Co., Ltd.)
Table of Contents
Statement 1
Table of Contents 2
I. Overview of the Issuer 3
II. Details of this Issuance 14
III. Information on the Sponsor's Designated Sponsor Representatives, Project Coordinator, and Other Project Team Members 15
IV. Relationship Between the Sponsor and the Issuer 16
V. Sponsor's Undertakings 17
VI. Approval and Authorization for the Listing of these Convertible Corporate Bonds 18
VII. Explanation of Compliance with Listing Conditions for this Securities Issuance 19
VIII. Arrangements for the Sponsor's Ongoing Supervision After Securities Listing 24
IX. Sponsor's Conclusion on the Listing of the Issuer's Convertible Corporate Bonds 25
Listing Sponsorship Letter for the Issuance of Convertible Corporate Bonds to Unspecified Qualified Investors on the ChiNext Market by Suzhou Tianmai Thermal Technology Co., Ltd.
I. Overview of the Issuer
(I) Basic Information of the Issuer