Xilong Scientific Co., Ltd. Announcement on the Progress of Providing Guarantees within the Consolidated Financial Statements

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Stock code: 002584 Stock abbreviation: Xilong Science Announcement No.: 2026-011

Xilong Science Co., Ltd.

Announcement on the Progress of Providing Guarantees Within the Scope of the Consolidated Financial Statements

All of the Company and the members of the Board of Directors guarantee that the information disclosure is true, accurate, and complete, and contains no false records, misleading statements, or material omissions.

I. Overview of Guarantee Matters

Xilong Science Co., Ltd. (hereinafter referred to as “Xilong Science” or “the Company”) The eighth meeting of the sixth session of the Board of Directors reviewed and approved the resolution on “the Company and its subsidiaries providing guarantees for financing credit facilities for 2025.” In 2025, based on the production and operating activities and capital needs of the Company and its subsidiaries (including its sub-subsidiaries), the Company and its subsidiaries (including its sub-subsidiaries) will provide guarantees for the companies within the scope of the consolidated financial statements to apply to financial institutions for financing credit facilities. The total guarantee额度 shall not exceed RMB 3.75 billion. The details are as follows:

For the subsidiaries (including its sub-subsidiaries) included in the scope of the consolidated financial statements to apply to financial institutions for financing credit facilities, the total guarantee amount shall not exceed RMB 2.085 billion. Of this, for subsidiaries (including its sub-subsidiaries) with an asset-liability ratio in the latest period of less than or equal to 70%, the guarantee amount shall not exceed RMB 1.635 billion; for subsidiaries (including its sub-subsidiaries) with an asset-liability ratio in the latest period of over 70%, the guarantee amount shall not exceed RMB 450 million. For subsidiaries (including its sub-subsidiaries) within the scope of the consolidated period to provide guarantees for other subsidiaries (including its sub-subsidiaries) within the scope to apply to financial institutions for financing credit facilities, the total guarantee amount shall not exceed RMB 55 million. Of this, for subsidiaries (including its sub-subsidiaries) with an asset-liability ratio in the latest period of less than or equal to 70%, the guarantee amount shall not exceed RMB 25 million; for subsidiaries (including its sub-subsidiaries) with an asset-liability ratio in the latest period of over 70%, the total guarantee amount shall not exceed RMB 30 million. For subsidiaries (including its sub-subsidiaries) to provide guarantees for the Company to apply to financial institutions for financing credit facilities, the total guarantee amount shall not exceed RMB 1.61 billion.

The validity period of the above-mentioned guarantee facility shall be from the date on which the Company’s 2024 annual general meeting approves it until the date on which the Company’s 2025 annual general meeting is convened. During the validity period, the guarantee facility amount may be used on a revolving basis.

The announcement content is set out in the Company’s announcement published on April 26, 2025 in the designated information disclosure media, “Xilong Science: Announcement on Guarantees for the Company and Subsidiaries for Financing Credit Facilities in 2025” (Announcement No.: 2025-016). This resolution has already been approved at the Company’s 2024 annual general meeting.

II. Progress of Guarantees

1、The Company and Guangzhou Branch of 广发银行股份有限公司 (Bank of Communications? as per name) have entered into a “Guarantee Contract for Maximum Amount,” under which, for all debts under the “Credit Facility Contract” with the number (2026) 汕银综授额字第000014号 signed for the subsidiary Guangdong Xilong Chemical Co., Ltd., the maximum principal balance of RMB 10 million shall be provided to the creditor Guangzhou Branch of 广发银行股份有限公司 as a joint and several liability guarantee.

2、The Company and 华夏银行股份有限公司成都郫都支行 have entered into a “Guarantee Contract for Maximum Amount” with contract number CDZX26（High 保）2026003, to provide guarantee for the obligations formed by the subsidiary Sichuan Xilong Science Co., Ltd. and the creditor 华夏银行股份有限公司成都郫都支行 under multiple working capital loan contracts consecutively signed based on the master contract. The maximum guaranteed creditor amount is RMB 10 million.

3、A joint and several liability guarantee contract has been signed between the Company’s subsidiary Foshan Xilong Chemical Co., Ltd. and the China Industrial and Commercial Bank Co., Ltd. Guangzhou Tianhe Sub-branch, to provide to the creditor the maximum principal balance of RMB 120 million as a joint and several liability guarantee for debts formed under the master contracts, including the foreign currency and RMB loan contract signed by the Company with the China Industrial and Commercial Bank Co., Ltd. Guangzhou Tianhe Sub-branch.

All the guarantees in this round are provided between entities within the scope of the consolidated financial statements. The approval procedures have been completed. The guarantee amount in this round is within the limit approved by the Company.

III. Basic Information of the Guaranteed Parties

1、Basic information

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2、Financial data

Unit: RMB ten thousand

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(Note: The above data for fiscal year 2024 has been audited, and the data from January to September 2025 has not been audited)

IV. Main Terms of the Guarantee Agreements

1、Name of creditor: Guangzhou Branch of 广发银行股份有限公司

Name of debtor: Guangdong Xilong Chemical Co., Ltd.

Name of guarantor: Xilong Science Co., Ltd.

Guarantee scope: includes principal of debts under the master contract, interest, penalty interest, compound interest, liquidated damages, damages for breach of contract, and fees incurred for realizing the creditor’s rights (including but not limited to litigation fees, arbitration fees, lawyer fees, travel expenses, execution fees, preservation fees, appraisal fees, auction or disposal fees, transfer fees, announcement fees, etc.), and all other payable expenses.

Period in which the principal debt arises: from March 13, 2026 to March 10, 2027

Guarantee amount: the maximum principal balance of the guaranteed creditor’s rights, RMB 10 million, and other expenses within the scope of the guarantee

Guarantee period: three years from the date on which the debtor under the principal contract’s performance period expires

Guarantee form: joint and several liability guarantee

2、Name of creditor: 成都郫都 Sub-branch of 华夏银行股份有限公司

Name of debtor: Sichuan Xilong Science Co., Ltd.

Name of guarantor: Xilong Science Co., Ltd.

Guarantee scope: principal of the principal creditor’s rights, interest, overdue interest, penalty interest, compound interest, liquidated damages, damages for breach of contract, foreign exchange loss (related losses caused by exchange rate changes), and appraisal fees, appraisal fees, auction fees, litigation fees, arbitration fees, notarization fees, lawyer fees, etc., as well as reasonable expenses incurred by the creditor for realizing its creditor’s rights and all other payable expenses of the debtor under the master contract.

Period in which the principal debt arises: from March 25, 2026 to March 31, 2031

Guarantee amount: RMB 10 million for the maximum creditor amount, plus other expenses within the scope of the guarantee

Guarantee period: three years from the date on which the performance period of each debt expires

Guarantee form: joint and several liability guarantee

3、Name of creditor: Guangzhou Tianhe Sub-branch of Industrial and Commercial Bank of China Co., Ltd.

Name of debtor: Xilong Science Co., Ltd.

Name of guarantor: Foshan Xilong Chemical Co., Ltd.

Guarantee scope: principal of the principal creditor’s rights (including the principal of precious metals leasing creditor’s rights and the RMB amount calculated as agreed under the precious metals leasing contract), interest, precious metals leasing fees and personalized service fees, compound interest, penalty interest, liquidated damages, damages for breach of contract, precious metals leasing weight surplus/deficit fees, foreign exchange loss (related losses caused by exchange rate changes), related losses caused by changes in precious metals prices, transaction fees generated when the leasing party of precious metals exercises the corresponding rights according to the master contract, and fees for realizing creditor’s rights (including but not limited to litigation fees, lawyer fees, etc.).

Period in which the principal debt arises: from March 25, 2026 to March 24, 2031

Guarantee amount: RMB 120 million for the maximum balance of principal creditor’s rights, plus other expenses within the scope of the guarantee

Guarantee period: three years from the date on which the performance period of debts under the master contract expires

Guarantee form: joint and several liability guarantee

V. Cumulative External Guarantees and Guarantees with Overdue Status

As of the date of disclosure of this announcement, the total cumulative external guarantees of the Company and its controlling subsidiaries are RMB 0 (excluding guarantees provided for companies within the scope of the consolidated financial statements). The actual guarantee balance of the Company for its controlling subsidiaries is RMB 934.52 million; the actual guarantee balance of controlling subsidiaries for the Company is RMB 870.39 million; the actual guarantee balance of subsidiaries for subsidiaries is RMB 16.00 million. The proportions of the above-mentioned guarantee amounts to the Company’s latest audited net assets are 40.64%, 37.85%, and 0.70%, respectively. The Company and its controlling subsidiaries have no guarantees with overdue status.

VI. Documents for Reference

1、The “Guarantee Contract for Maximum Amount” signed by the Company and Guangzhou Branch of 广发银行股份有限公司;

2、The “Guarantee Contract for Maximum Amount” signed by the Company and Chengdu Pidu Sub-branch of 华夏银行股份有限公司;

3、The “Guarantee Contract for Maximum Amount” signed by Foshan Xilong Chemical Co., Ltd. and Guangzhou Tianhe Sub-branch of Industrial and Commercial Bank of China Co., Ltd.

This announcement is hereby issued.

Xilong Science Co., Ltd.

Board of Directors

March 30, 2026

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