Jiangsu United Water Services Technology Co., Ltd. Progress Announcement on Guarantee Provided in March 2026

Stock Code: 603291 Stock Short Name: United Water Utilities Announcement No.: 2026-011

Jiangsu United Water Utilities Technology Co., Ltd.

Announcement on the Progress of Providing Guarantees in March 2026

The board of directors of this company and all directors hereby guarantee that there are no false records, misleading statements, or material omissions in the contents of this announcement, and assume legal responsibility for the authenticity, accuracy, and completeness of the contents.

Key Information:

● Jiangsu United Water Utilities Technology Co., Ltd. (hereinafter referred to as the “Company”) respectively held the 14th meeting of the second session of the board of directors on April 23, 2025, and the 2024 annual general meeting of shareholders on May 20, 2025, deliberated and approved the “Proposal on the Estimated External Guarantee Quotas for the Company in 2025.” The Company discloses the actual guarantee progress of the Company and its subsidiary companies on a monthly basis by aggregating the information.

● Cumulative number of external guarantees that are overdue: none

I. Overview of External Guarantee Situations

(I) Estimated External Guarantee Quotas for 2025

To meet the funding needs of the Company and its subsidiaries for day-to-day operations and business development, improve decision-making efficiency, and coordinate the guarantee matters of the Company and its subsidiaries (including holding and wholly owned subsidiaries), the Company held the 14th meeting of the second session of the board of directors on April 23, 2025, and the 2024 annual general meeting of shareholders on May 20, 2025, deliberated and approved the “Proposal on the Estimated External Guarantee Quotas for the Company in 2025.” It was agreed that the Company’s estimated新增 external guarantee quota for 2025 would be RMB 278,000 million. The guarantee quota includes the portion for the Company to provide guarantees to its subsidiary companies, the portion for subsidiary companies to provide guarantees to the Company, and the combined calculation of guarantee quotas between subsidiary companies. Among them, the guarantee quota for providing guarantees to subsidiaries with an asset-liability ratio of 70% or above is RMB 32,900 million, the guarantee quota for providing guarantees to subsidiaries with an asset-liability ratio below 70% is RMB 155,100 million, and the guarantee quota for subsidiaries to provide guarantees to the Company is RMB 90,000 million. For details, please refer to the “Announcement on the Estimated External Guarantee Quotas for the Company in 2025” disclosed by the Company on April 25, 2025 (Announcement No.: 2025-020).

(II) External Guarantee Business Occurrences of the Company in March 2026

In March 2026, the Company and its subsidiary companies had no新增 external guarantees.

II. Total Number of Cumulative External Guarantees and the Number of Overdue Guarantees

As of March 31, 2026, the total amount of external guarantees provided by the Company and its holding subsidiaries is RMB 348,960.74 million. The Company and its holding subsidiaries did not provide guarantees to entities outside the consolidated financial statements. The total amount of guarantees provided by the Company to its holding subsidiaries is RMB 227,054.90 million, accounting for 127.82% of the Company’s latest audited net assets attributable to shareholders in the most recent period.

The Company did not provide guarantees to its controlling shareholders, actual controllers, or their related parties, and there are also no overdue external guarantees and no external guarantees involving lawsuits.

This announcement is hereby issued.

Board of Directors of Jiangsu United Water Utilities Technology Co., Ltd.

April 1, 2026

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