Guotai Haitong Securities Co., Ltd.'s Issuance Sponsorship Letter Regarding Cailian Technology Co., Ltd.'s Issuance of Convertible Corporate Bonds to Unspecified Targets

Guotai Haitong Securities Co., Ltd.

Regarding

Cailian Technology Co., Ltd.

Issuance of Convertible Corporate Bonds to Unspecified Targets

Issuance Sponsorship Letter

Sponsor (Lead Underwriter)

No. 618 Shangcheng Road, China (Shanghai) Pilot Free Trade Zone

July 2026

Regarding Cailian Technology Co., Ltd.

Cailian Technology Co., Ltd. intends to apply for the issuance of convertible corporate bonds to unspecified targets in an amount not exceeding RMB 1,270,000,000.00 for listing on the ChiNext market, and has engaged Guotai Haitong Securities Co., Ltd. as the sponsor for this securities issuance.

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, regulations, and the rules of the China Securities Regulatory Commission and the Shenzhen Stock Exchange, the sponsor and its designated representatives act with honesty, trustworthiness, and due diligence. They have issued this sponsorship letter in strict accordance with legally formulated business rules, industry practice standards, and ethical codes, and guarantee the truthfulness, accuracy, and completeness of this sponsorship letter.

(Unless otherwise specified in this sponsorship letter, relevant terms have the same meanings as those in the Prospectus for the Issuance of Convertible Corporate Bonds to Unspecified Targets by Cailian Technology Co., Ltd. Differences in the last digits between some totals and the sum of their components in this sponsorship letter, or differences in the last digits between some ratio indicators and the results of direct calculations, are due to rounding.)

Table of Contents

1. Table of Contents

2. Definitions

3. Section 1: Basic Information on This Securities Issuance

4. 1. Name of the Sponsor
5. 1. Basic Information on Personnel Designated by the Sponsor
6. 1. Type of This Securities Issuance
7. 1. Basic Information on the Issuer
8. 1. Verification of Affiliation Between the Sponsor and the Issuer
9. 1. Internal Review Procedures and Opinions of the Sponsor

10. Section 2: Commitments of the Sponsor

11. 1. General Commitments of the Sponsor Regarding This Issuance
12. 1. Itemized Commitments of the Sponsor Regarding This Issuance

13. Section 3: Recommendation Opinions on This Issuance

14. 1. Recommendation Conclusion of the Sponsor Regarding This Securities Issuance
15. 1. Decision-making Procedures Performed by the Issuer for This Securities Issuance
16. 1. Compliance of This Issuance with Relevant Provisions of the Securities Law on Issuing Convertible Corporate Bonds to Unspecified Targets
17. 1. Compliance of This Issuance with Relevant Provisions of the Registration Management Measures on Issuing Convertible Corporate Bonds to Unspecified Targets
18. 1. Compliance of This Securities Issuance with Special Provisions of the Registration Management Measures on the Issuance and Underwriting of Convertible Corporate Bonds
19. 1. The Company Does Not Fall Within the Scope of Enterprises Subject to Joint Punishment Under the Memorandum of Understanding on Joint Punishment of Dishonest Judgment Debtors and the Memorandum of Understanding on Joint Punishment of Dishonest Customs Enterprises, and Is Not a General Dishonest Enterprise or Dishonest Customs Enterprise
20. 1. Major Risks Faced by the Issuer
21. 1. Evaluation of the Issuer's Development Prospects
22. 1. Verification Opinions on the Engagement of Third Parties in Investment Banking Business

Definitions

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