Jinan High-tech Development Co., Ltd. Announcement on the Signing of Relevant Procurement Contracts and Related Party Transactions by Its Wholly-Owned Subsidiary

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Stock Code: 600807 Stock Short Name: Jiga Development Announcement No.: Lin2026-003

Jinan Hi-Tech Development Co., Ltd.

Announcement on the Execution by a Wholly Owned Subsidiary of Relevant Procurement Contracts and Related-Party Transactions

The Company and all members of the Board of Directors guarantee that there are no false records, misleading statements, or material omissions in the contents of this announcement, and assume legal responsibility for the truthfulness, accuracy, and completeness of the contents.

Key Information Highlights:

● Shandong Ruifuxiang Trading Co., Ltd. (the “Ruifuxiang Trading”), a wholly owned subsidiary of the Company, and Jinan Dongsheng Urban Renewal and Development Co., Ltd. (the “Dongsheng Urban Renewal Company”) have signed the “Steel Bar Procurement Contract.” Ruifuxiang Trading will provide steel bars for its real estate project at a price of (〈My Iron and Steel〉 steel bar market price in the then-current prefecture-level city where the project is located + 37) yuan/ton.

I. Overview of the Transaction

On August 1, 2025, the Company held the 24th Extraordinary Meeting of the 11th Session of the Board of Directors, which approved the “Proposal on the Examination of the Wholly Owned Subsidiary’s Signing of a Steel Bar Procurement Agreement and Related-Party Transactions.” It agreed that Ruifuxiang Trading and Jinan Hi-Tech Holdings Group Co., Ltd. (the “Jiga Holdings Group”) would sign the “Jiga Holdings Group 2025–2026 Steel Bar Centralized Procurement Strategic Agreement.” Steel bars would be provided to Jiga Holdings Group and its affiliated companies for projects developed within Shandong Province at (market price + 37) yuan/ton. The estimated procurement volume of Jiga Holdings Group and its affiliated companies for 2025–2026 is approximately 100k tons. Ruifuxiang Trading and two other successful bidders will win through public bidding. For details, please refer to the announcement “Announcement on the Execution by a Wholly Owned Subsidiary of a Steel Bar Procurement Agreement and Related-Party Transactions” disclosed by the Company on August 2, 2025 in the designated media.

Recently, Ruifuxiang Trading, a wholly owned subsidiary of the Company, signed the “Steel Bar Procurement Contract” with Dongsheng Urban Renewal and Development Co., Ltd. Ruifuxiang Trading will provide steel bars for its real estate projects in total of 6,300 tons at (〈My Iron and Steel〉 steel bar market price in the then-current prefecture-level city where the project is located + 37) yuan/ton. Dongsheng Urban Renewal and Development Co., Ltd. is a subsidiary controlled by Jinan Dongtuo Real Estate Co., Ltd., one of the Company’s controlling shareholders. This transaction constitutes a related-party transaction and does not constitute a material asset restructuring. The transaction amount falls within the successful-bid quota mentioned above, so it is not necessary to submit the matter for consideration by the Company’s board of directors and shareholders’ meeting.

II. Basic Information of the Counterparty

Dongsheng Urban Renewal and Development Co., Ltd., Unified Social Credit Code: 91370100MADJ3T8UX2; Legal Representative: Zhu Dukun; Date of Establishment: April 17, 2024; Registered Capital: RMB 10 million, of which Jinan Dongtuo Real Estate Co., Ltd. holds 100% of its equity interests; Registered Address: Building A, Jinan Yaogu No. 1, No. A, Hongxing Section 3, North Segment, Sun Village Subdistrict Office, Jinan High-tech Zone, Shandong Province; Business Scope: General projects: construction of landscaping and greening engineering; investing activities with its own funds; engineering management services; housing leasing; leasing of non-residential real estate; leasing of land use rights; park management services; planning and design management; land remediation services. Licensed projects: real estate development and operation.

Dongsheng Urban Renewal and Development Co., Ltd. is a subsidiary controlled by Jinan Dongtuo Real Estate Co., Ltd., one of the Company’s controlling shareholders, and is therefore an affiliated party of the Company.

As of December 31, 2025, Dongsheng Urban Renewal and Development Co., Ltd. has total assets of RMB 222.7729 million and net assets of RMB 7.4886 million; in 2025, it realized operating revenue of RMB 0 million and net profit of RMB -0. (Unaudited)

III. Main Contents of the Relevant “Steel Bar Procurement Contract” Signed by Ruifuxiang Trading

1. Subject and Quantity: Ruifuxiang Trading will provide steel bars in total of 6,300 tons for the related real estate projects of Dongsheng Urban Renewal and Development Co., Ltd. Settlement prices will be determined once every half month; the settlement price will be (〈My Iron and Steel〉 steel bar market price in the then-current prefecture-level city where the project is located + 37) yuan/ton. The final settled quantity shall be subject to the quantity actually received and signed for by Dongsheng Urban Renewal and Development Co., Ltd.

The contract also sets forth arrangements regarding settlement methods, packaging standards, acceptance, and liability for breach of contract, among other matters.

IV. Main Contents of the Related-Party Transaction and Pricing Policy

Ruifuxiang Trading previously won the steel bar centralized procurement project of Jiga Holdings Group through public bidding and signed the centralized procurement strategic agreement. The pricing for this transaction is determined on the basis of the pricing principles agreed in the prior centralized procurement strategic agreement. The pricing is fair and reasonable, and complies with the requirements of relevant laws, regulations, and normative documents of the state. There is no situation in which the Company’s interests are harmed by using related-party relationships or in which benefits are transferred to related parties.

V. Impact of This Transaction on the Company

After Ruifuxiang Trading signs the relevant steel bar procurement agreements, it is expected to increase the Company’s operating revenue. The specific impact amount shall be determined based on the final audited figures provided by the annual audit accounting firm. The transaction price is determined based on fair, reasonable, and market-oriented principles, and there is no situation that harms the interests of the Company or its shareholders.

VI. Historical Related-Party Transaction Information

1. The Company and its wholly owned subsidiaries, Jinan Hi-Tech Biomedical Technology Co., Ltd. and Jinan Hi-Tech Industrial Development Co., Ltd., each applied to related party Jinan Shunzheng Investment Co., Ltd. for loans in the amounts of RMB 70 million, RMB 40 million, and RMB 30 million, respectively; the loan interest rate is 5.9% per annum; the loan term is 12 months. In addition, the Company’s controlling subsidiary, Shandong Aikwei Biotechnology Co., Ltd., applied to related party Jinan Hi-Tech Caijin Investment Co., Ltd. for a loan of RMB 4 million, with an interest rate of 6% per annum and a loan term of 12 months. For details, please refer to the relevant announcement disclosed by the Company on May 31, 2025.

2. For the Company and subsidiaries, in 2025 it is proposed that they apply for loan facilities of no more than RMB 1 billion (or equivalent foreign currency) from the Company’s controlling shareholder, Hi-Tech Chengjian, and its persons acting in concert and related parties. During the effective period, the loan facility amount may be reused on a revolving basis. The loan interest rate will be determined with reference to the interest rate levels of bank and other financial institutions for loans during the same period and the actual financing costs of the controlling shareholder and related parties, to be negotiated by both parties when signing the loan agreement. As of now, the above loan facilities have been used in the amount of RMB 263 million. For details, please refer to the relevant announcements disclosed by the Company on April 30, 2025, June 21, 2025, and December 17, 2025.

3. The Company’s wholly owned subsidiary, Ruifuxiang Trading, signed the centralized procurement strategic agreement with Jiga Holdings Group, and will provide steel bars to Jiga Holdings Group and its affiliated companies for projects developed within Shandong Province at (market price + 37) yuan/ton, with a scale of approximately 100k tons. Ruifuxiang Trading has signed steel bar procurement contracts with the related parties, namely Jinan Hi-Tech Urban Renewal and Development Co., Ltd., Jinan Dongsheng Urban Renewal and Development Co., Ltd., and Jinan Dongjin Industrial Development Co., Ltd., respectively, and will provide steel bars for the related real estate projects that they develop. For details, please refer to the relevant announcements disclosed by the Company on August 2, 2025 and August 29, 2025.

4. The Company’s wholly owned subsidiary, Jinan Hi-Tech Industrial Development Co., Ltd., signed a “Entrusted Operation Agreement” and an “Asset Operation Management Entrustment Agreement” with, respectively, Jiga Holdings Group, one of the controlling shareholders, and Jinan Dongxin Development and Construction Co., Ltd., a related party. Under these agreements, the projects such as the Training and Entrepreneurship Park Building No. 2 for studying abroad personnel, whose operation and management are entrusted, were entrusted to Jina Hi-Tech Industrial Development for operation and management. The project operation management fees are settled in the form of basic fees + incremental incentive rewards. For details, please refer to the announcement disclosed by the Company on October 31, 2025 titled “Announcement on the Execution by a Wholly Owned Subsidiary of Related Asset Operation Entrustment Agreements and Related-Party Transactions.”

5. The Company’s controlling subsidiary, Jinan Gaohe Property Development Co., Ltd. (the “Gaohe Property”), signed a “Property Services Entrustment Contract” with, respectively, Jiga Holdings Group, one of the controlling shareholders, and Jinan Dongxin Development and Construction Co., Ltd., a related party. Under these agreements, projects such as the Training and Entrepreneurship Park Building No. 2 for studying abroad personnel, whose operation and management are entrusted, were entrusted to Gaohe Property to provide property services. Gaohe Property will charge property service fees for the above projects at a rate of RMB 4.99 per square meter per month (inclusive of tax). For details, please refer to the announcement disclosed by the Company on October 31, 2025 titled “Announcement on the Execution by the Controlling Subsidiary of Related Property Services Entrustment Contracts and Related-Party Transactions.”

6. One of the Company’s controlling shareholders, Jinan Hi-Tech Urban Construction and Development Co., Ltd., issued a “Waiver Letter,” which, respectively, waived the principal and interest related to the loans totaling RMB 280.1572 million between the Company and its wholly owned subsidiaries, Jinan Hi-Tech Biomedical Technology Co., Ltd. and Shandong Yong’an Real Estate Development Co., Ltd.; Jinan Shunzheng Investment Co., Ltd., a related party, issued a “Waiver Letter,” which, respectively, waived the principal and interest related to the loans totaling RMB 97.4676 million between the Company and its wholly owned subsidiary, Jinan Hi-Tech Industrial Development Co., Ltd. The total amount of debt waiver is RMB 377.6248 million. For details, please refer to the announcement disclosed by the Company on December 29, 2025 titled “Announcement on the Debt Waiver by the Controlling Shareholder and Related Party.”

The Company’s designated information disclosure media are 《Shanghai Securities News》《China Securities Journal》《Securities Times》《Securities Daily》 and the website of the Shanghai Stock Exchange. All Company information shall be subject to the information published in the above designated media.

This announcement is hereby issued.

Jinan Hi-Tech Development Co., Ltd.

Board of Directors

April 2, 2026

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