Jinhua Chun Guang Rubber & Plastic Technology Co., Ltd. Progress Announcement on Providing Guarantee for Its Wholly-Owned Subsidiary

Security Code: 603657 Security Brief: Springlight Technology Announcement No.: 2026-005

Jinhua Springlight Elastics & Plastics Technology Co., Ltd.

Progress Announcement on the Provision of Guarantees for a Wholly-Owned Subsidiary

This Company’s Board of Directors and all directors guarantee that the contents of this announcement contain no false records, misleading statements, or material omissions, and assume legal responsibility for the truthfulness, accuracy, and completeness of this announcement’s contents.

Key Information:

● Guarantee Target and Basic Information

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● Cumulative Guarantee Information

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I. Overview of the Guarantee

(I) Basic Information of the Guarantee

To meet and support the business development and financing needs of Suzhou Shangteng Technology Manufacturing Co., Ltd. (hereinafter referred to as “Suzhou Shangteng”), a wholly-owned subsidiary of Jinhua Springlight Elastics & Plastics Technology Co., Ltd. (hereinafter referred to as the “Company”), on April 2, 2026, the Company entered into an “Irrevocable Guarantee Letter” with China Merchants Bank Co., Ltd. Suzhou Branch (hereinafter referred to as “China Merchants Bank Suzhou Branch”), agreeing that the Company provides a joint and several liability guarantee for financing business handled by Suzhou Shangteng with China Merchants Bank Suzhou Branch. The maximum principal balance under the guarantee is RMB 300.00 million.

(II) Internal Decision-Making Procedures

On March 10, 2026, and March 26, 2026, the Company held the Third Meeting of the Fourth Session of the Board of Directors and the First Extraordinary General Meeting of Shareholders in 2026, respectively, and approved the “Proposal on Providing a Guarantee for a Wholly-Owned Subsidiary.” It was planned that the Company would provide a guarantee to Suzhou Shangteng of no more than RMB 400.00 million. The authorization period would be within 12 months from the date the general meeting approved the proposal. For details, please refer to the Company’s “Springlight Technology Announcement on Providing a Guarantee for a Wholly-Owned Subsidiary” disclosed on March 11, 2026 (Announcement No.: 2026-002) and the “Springlight Technology 2026 First Extraordinary General Meeting of Shareholders Resolution Announcement” disclosed on March 27, 2026 (Announcement No.: 2026-004).

II. Basic Information of the Guaranteed Party

(I) Basic Information

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III. Principal Contents of the Guarantee Agreement

1. Guarantor: Jinhua Springlight Elastics & Plastics Technology Co., Ltd.

2. Debtor: Suzhou Shangteng Technology Manufacturing Co., Ltd.

3. Guarantee Amount: Three Hundred Million (in words)

4. Guarantee Mode: Joint Guarantee Liability

5. Scope of Guarantee: All indebtedness of the debtor under the “Fixed Asset Loan Contract” (hereinafter referred to as the “principal contract”), including in particular: the full amount of loans disbursed to the debtor by China Merchants Bank Suzhou Branch under the principal contract, the principal amount of the bills payable upon acceptance and the corresponding interest, penalties, default interest, liquidated damages, and amounts for delayed performance; the principal amount and interest, penalties, default interest, liquidated damages, and amounts for delayed performance of advances made by China Merchants Bank Suzhou Branch to the debtor due to its obligations to pay under commercial bills that are accepted under the principal contract, or under the letter of credit opened; the principal amount and corresponding interest, penalties, default interest, liquidated damages, and amounts for delayed performance of all bills discounted by China Merchants Bank Suzhou Branch under the principal contract; and expenses incurred by China Merchants Bank Suzhou Branch in order to realize its security rights and creditor’s rights (including but not limited to litigation fees, attorney’s fees, announcement fees, delivery fees, travel expenses, fees for applying for issuance of certificates for compulsory enforcement, etc.) and all other related expenses. If the loan under the principal contract is repaid or converted by the debtor’s application through existing loans, bill discount proceeds, or letter of credit payment, or if China Merchants Bank Suzhou Branch, upon the debtor’s application, repays the guaranteed advance debts such as letters of credit or bills under the principal contract with new loans during the guarantee liability period, the guarantor confirms that the resulting debts are included within the scope of the guarantee.

6. Guarantee Period: From the date this guarantee letter becomes effective until the date the loan or other debts mature, or from the date the advances are made, plus an additional three years. If the loan or other debts are extended, the guarantee period will continue until the end of the extension period plus an additional three years.

IV. Necessity and Reasonableness of the Guarantee

The Company’s provision of a guarantee for its wholly-owned subsidiary this time is to meet and support the business development and financing needs of the wholly-owned subsidiary, in line with the Company’s actual operating conditions, overall development strategy, and the requirements for sustainable development. The Company has control over the guaranteed party; it has a full understanding of the guaranteed party’s operating conditions, creditworthiness, and repayment ability. The Board of Directors of the Company has carefully assessed the guaranteed party’s ability to repay its debts. The risks related to the above guarantee matters are controllable. The guarantee will not damage the interests of the Company’s shareholders. It complies with relevant laws and regulations, regulatory documents, and the relevant provisions of the Company’s Articles of Association, and it is necessary and reasonable.

V. Board of Directors’ Opinions

Regarding this external guarantee matter, the Company convened the Third Meeting of the Fourth Session of the Board of Directors and the First Extraordinary General Meeting of Shareholders of 2026 on March 10, 2026, and March 26, 2026, respectively, and approved the “Proposal on Providing a Guarantee for a Wholly-Owned Subsidiary.” The authorization was granted for the Company’s legal representative, or an authorized agent designated by the legal representative, to sign the relevant agreements and documents; for handling each individual guarantee matter, a separate meeting of the board of directors or general meeting of shareholders will no longer be required.

VI. Number of Cumulative External Guarantees and Number of Overdue Guarantees

As of the date of disclosure of this announcement, the total amount of the Company’s and its controlling subsidiaries’ external guarantees is RMB 730.00 million, accounting for 77.70% of the Company’s most recent audited net assets. Of this, the total amount of guarantees provided by the Company to its wholly-owned subsidiaries is RMB 730.00 million, accounting for 77.70% of the Company’s most recent audited net assets. In addition, the Company has no other external guarantee arrangements, and there are no overdue external guarantees.

Announcement is hereby given.

Board of Directors of Jinhua Springlight Elastics & Plastics Technology Co., Ltd.

April 3, 2026

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