Sentis Group Co., Ltd. Progress Announcement on Providing Guarantees

Stock Code: 603098 Stock Short Name: Centec Holdings Announcement No.: 2026-007

Centec Shixing Group Co., Ltd.

Announcement on the Progress of Providing Guarantees

The board of directors of the Company and all directors hereby guarantee that this announcement contains no false records, misleading statements, or material omissions, and assume individual and joint liability for the authenticity, accuracy, and completeness of the contents.

Key Information:

● Guaranteed party: Centec Shixing Group Co., Ltd. (hereinafter referred to as the “Company”) and its subsidiaries.

● Amount of guarantees provided: In the recent period, the Company and its subsidiaries incurred an additional total guarantee amount of RMB 5,590,300 among them, of which the Company provided a guarantee of RMB 54,300 for its subsidiary.

As of March 31, 2026, the cumulative guarantee amount between the Company and its subsidiaries is RMB 347.9506 million, accounting for 12.62% of the Company’s latest audited net assets attributable to the parent. Of which: the Company provided guarantees of RMB 284.8969 million for subsidiaries within the consolidated financial statements scope, and subsidiaries provided guarantees of RMB 63.0537 million to the Company. The above guarantees all fall within the scope of guarantees between the Company and its subsidiaries, and do not involve external guarantees.

● Whether there is counter-guarantee: No

● Cumulative number of overdue external guarantees: 0

I. Progress of Guarantees

(I) Guarantee arrangements

Based on operational needs, the Company issued a bank letter of guarantee of RMB 54,300 for the business activities of its subsidiary Shaanxi Centec Zhidin Labor Co., Ltd.; within the guarantee quota with a maximum amount provided by its subsidiary Longi Centec New Energy Co., Ltd. to the Company, the Company handled supply chain finance business of RMB 55.360 million.

(II) Decision-making procedures for the guarantees

The Company’s 5th session of the board of directors’ second meeting and the 2024 annual general meeting of shareholders approved the “Proposal on the Estimated Guarantee Quotas Between the Company and Its Subsidiaries for 2025” (for details, see the Company’s announcements on April 23, 2025 and June 28, 2025 on the website of the Shanghai Stock Exchange (

The Company expects to provide guarantees to the guaranteed parties, namely its controlling subsidiaries within the consolidated financial statements scope, and that subsidiaries will provide mutual guarantees between them, with the total guarantee amount for which subsidiaries provide guarantees to the Company not exceeding RMB 130,000 million. Among them, for guaranteed parties with an asset-liability ratio of 70% or above, the guarantee amount shall not exceed RMB 50,000 million; for controlling subsidiaries with an asset-liability ratio below 70%, it shall not exceed RMB 80,000 million; the actual guarantee amount shall be subject to the final signed guarantee contracts or the bank’s approvals.

Within the above quota range, guarantee quota adjustments may be made. However, when adjustments occur, guaranteed parties with an asset-liability ratio of 70% or above may obtain guarantee quotas only from the quota amounts for guaranteed parties with an asset-liability ratio of 70% or above that were expected in the estimates reviewed by the general meeting of shareholders. The authorization period for the above-mentioned estimated guarantee matters shall be from the date on which the quota is approved by the general meeting of shareholders until the date on which the general meeting of shareholders in the following year approves the new quota.

The Company and its subsidiaries handling business within the above-mentioned guarantee scope do not require convening any additional meetings of the board of directors or the general meeting of shareholders for deliberation.

II. Necessity and Reasonableness of the Guarantees

The above-mentioned estimated guarantees and authorization matters are to meet the operational needs of the Company and its subsidiaries, conform to the Company’s overall interests and development strategy, and the guaranteed parties are the Company and its subsidiaries. The Company can effectively control the risks in their daily operating activities and decision-making, can timely manage their credit standing, and the risks are controllable.

III. Opinions of the Board of Directors

The above guarantee matters are to meet the daily operational and business development needs of the Company and its subsidiaries and comply with the Company’s overall strategy. The related guarantees fall within the estimated guarantees and authorization scope for 2025 of the Company, and therefore do not require submission to the board of directors or the general meeting of shareholders for additional deliberation.

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

As of March 31, 2026, the cumulative guarantee amount between the Company and its subsidiaries is RMB 347.9506 million, accounting for 12.62% of the Company’s latest audited net assets attributable to the parent. Of which: the Company provided guarantees of RMB 284.8969 million for subsidiaries within the consolidated financial statements scope, and subsidiaries provided guarantees of RMB 63.0537 million to the Company. All the above guarantees fall within the scope of guarantees between the Company and its subsidiaries. The Company and its subsidiaries provided guarantees of RMB 279.1859 million for guaranteed parties with an asset-liability ratio of 70% or above in the latest period, and provided guarantees of RMB 68.7646 million for guaranteed parties with an asset-liability ratio below 70%. The Company has not provided guarantees to controlling shareholders, de facto controllers, or their related parties, and there are no overdue guarantees.

This is hereby announced.

Board of Directors of Centec Shixing Group Co., Ltd.

April 4, 2026

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Continuing table:

Unit: RMB 10,000

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Note 1: Beijing Centec New Energy Investment Co., Ltd. is a controlling subsidiary in which the Company holds 80% equity; Beijing Centec Zhongcheng Enterprise Management Development Center (Limited Partnership) holds 20%. The Company provides guarantees according to its contribution ratio.

Note 2: Guangzhou Industry & Commerce Environmental Protection Technology Co., Ltd. is a company jointly established by the Company and Guangzhou Wanbao Home Appliances Holding Co., Ltd. The Company contributes RMB 60 million, accounting for 60% of the equity; Guangzhou Wanbao Home Appliances Holding Co., Ltd. contributes RMB 40 million, accounting for 40% of the equity. The Company provides guarantees according to its contribution ratio.

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