Announcement on Company's Involvement in Irregular Guarantees

Securities Code: 300290 Securities Abbreviation: Rongke Technology Announcement No.: 2026-030

Rongke Technology Co., Ltd.

Announcement on Company's Involvement in Irregular Guarantees

The Company and all members of its board of directors guarantee the truthfulness, accuracy, and completeness of the information disclosed, and have no false records, misleading statements, or major omissions.

Special Reminder:

Following a comprehensive investigation and inquiries to the historical cooperative banks and related parties of the former controlling shareholder during its period of control, as of the disclosure date of this announcement, in addition to the irregular guarantee matter disclosed by the Company on May 29, 2026 (see Announcement No.: 2026-024), the Company also has five irregular guarantees provided to Fushun Bank Co., Ltd. The outstanding principal balance of these irregular guarantees is RMB 68,496.99 million plus related interest. All were irregular guarantees provided by exceeding authority without fulfilling any internal control approval/board of directors/shareholder meeting deliberation and decision-making procedures.

I. Irregular Guarantee Situation

1. On June 10, 2020, the Company signed a "Maximum Guarantee Contract" (Contract No.: Fuyin Zongxin 2020 Zongxin 01 Gao Bao 04) with Fushun Bank Co., Ltd. (hereinafter referred to as Fushun Bank) to provide guarantees for the "Comprehensive Credit Line Contract" (Contract No.: Fuyin Zongzhi 2020 Zongzhi 01) and the "Working Capital Loan Contract" (Contract No.: Fuyin Zongzhi 2020 Liudai 07) signed between Shenyang Zhiyuan Petrochemical Co., Ltd. and Fushun Bank. The maturity date of this loan is April 29, 2024, with a guaranteed principal of RMB 140 million and an outstanding principal balance of RMB 135 million.

2. On November 16, 2020, the Company signed a "Guarantee Contract" (Contract No.: Fuyin Kaizhi 2020 Liudai 01 Bao 01) with the Development Zone Branch of Fushun Bank Co., Ltd. (hereinafter referred to as Fuyin Kaizhi) to provide guarantees for the "Working Capital Loan Contract" (Contract No.: Fuyin Kaizhi 2020 Liudai 01) signed between Shenyang Zhiyuan Petrochemical Co., Ltd. and Fuyin Kaizhi. The maturity date of this loan is April 25, 2025, with a guaranteed principal of RMB 75 million and an outstanding principal balance of RMB 7,496.99 million.

3. On November 16, 2020, the Company signed a "Guarantee Contract" (Contract No.: Fuyin Kaizhi 2020 Liudai 02 Bao 01) with Fuyin Kaizhi to provide guarantees for the "Working Capital Loan Contract" signed between Shenyang Jinqian Energy Technology Co., Ltd. and Fuyin Kaizhi (Contract No.: Fuyin Kaizhi 2020 Liudai 02). The maturity date of this loan is April 25, 2025, with a guaranteed principal of RMB 200 million and an outstanding principal balance of RMB 200 million.

4. On December 16, 2020, the Company signed a "Guarantee Contract" (Contract No.: Fuyin Kaizhi 2020 Liudai 03 Bao 06) with Fuyin Kaizhi to provide guarantees for the "Working Capital Loan Contract" signed between Liaoning Guoke Energy Co., Ltd. and Fuyin Kaizhi (Contract No.: Fuyin Kaizhi 2020 Liudai 03). The maturity date of this loan is June 5, 2025, with a guaranteed principal of RMB 55 million and an outstanding principal balance of RMB 55 million.