Ningbo Heli Technology Co., Ltd. Announcement of Resolutions of the Second Meeting of the Seventh Board of Directors

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Security code: 603917 Stock abbreviation: Heli Technology Announcement No.: 2026-010

Ningbo Heli Technology Co., Ltd.

Resolution Announcement of the Second Meeting of the Seventh Session of the Board of Directors

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

I. Details of the convening of the board meeting

The second meeting of the seventh session of the board of directors of Ningbo Heli Technology Co., Ltd. (hereinafter referred to as the “Company”) was held in the company’s meeting room in person on March 31, 2026, with nine directors entitled to attend and nine directors actually attending the meeting. The meeting was chaired by Mr. Shi Dingwei, the Company’s chairman. All senior management personnel of the Company attended the meeting.

The procedures for the convening, holding, and voting of this meeting comply with the relevant provisions of laws, regulations, and the Articles of Association. The resolutions formed at the meeting are lawful and valid.

II. Consideration of matters by the board meeting

(I) Approved the Proposal on Using Temporarily Idle Raised Funds for Cash Management

For specific details, please refer to the Company’s announcement published on the website of the Shanghai Stock Exchange (www.sse.com.cn) on the same day: “Heli Technology: Announcement on Using Temporarily Idle Raised Funds for Cash Management” (Announcement No.: 2026-011). The sponsor has issued a special verification opinion.

Voting result: 9 votes in favor, 0 votes against, 0 votes abstaining, 0 votes avoiding.

(II) Approved the Proposal on Using Part of Temporarily Idle Raised Funds to Temporarily Supplement Working Capital

For specific details, please refer to the Company’s announcement published on the website of the Shanghai Stock Exchange (www.sse.com.cn) on the same day: “Heli Technology: Announcement on Using Part of Temporarily Idle Raised Funds to Temporarily Supplement Working Capital” (Announcement No.: 2026-012). The sponsor has issued a special verification opinion.

Voting result: 9 votes in favor, 0 votes against, 0 votes abstaining, 0 votes avoiding.

This is hereby announced.

Board of Directors of Ningbo Heli Technology Co., Ltd.

April 1, 2026

Security code: 603917 Stock abbreviation: Heli Technology Announcement No.: 2026-011

Ningbo Heli Technology Co., Ltd.

Announcement on Using Idle Raised Funds for Cash Management

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

Key points:

● Investment types: principal-protected products such as ordinary large-denomination time deposits, structured deposits, unit agreed deposits, time deposits, etc.

● Investment amount: not more than (including) RMB 38,000 million

● Completed and proposed review procedures: after being considered and approved at the second meeting of the seventh session of the board of directors of the Company, this matter does not need to be submitted to the shareholders’ meeting for consideration.

● Special risk warning: The Company intends to purchase low-risk, principal-protected wealth management products that have high safety, meet the principal-protection requirements, whose issuing entities can provide a principal-protection commitment, and have good liquidity and will not affect the normal implementation of the raised funds investment plan. However, the financial market is greatly influenced by macroeconomic factors, and it is not excluded that this investment may be affected by risks including market fluctuation risk, interest rate risk, liquidity risk, policy risk, information transmission risk, and risk of force majeure. The yield will fluctuate, and the wealth management returns are uncertain.

I. Overview of investment

(I) Investment purpose

To improve the Company’s utilization efficiency of funds, and without affecting the construction of raised funds projects and the Company’s normal business operations, the Company will reasonably use part of the temporarily idle raised funds for cash management to increase fund returns, so that the Company and its shareholders can obtain more investment returns. This investment will not affect the normal implementation of the Company’s raised funds investment plan, and the allocation of fund usage is reasonable.

(II) Investment amount

The Company plans to use up to a maximum amount not exceeding RMB 38,000 million (including RMB 38,000 million) of temporarily idle raised funds for cash management. The usage term shall not exceed 12 months. Within the above limits and the validity period of the relevant resolutions, the funds may be used in a revolving and rolling manner.

(III) Source of funds

The funds for this delegated wealth management are drawn from the temporarily idle raised funds from the issuance of shares to specific targets by the Company.

With the approval from the China Securities Regulatory Commission’s “Approval of Ningbo Heli Technology Co., Ltd.’s Registration for the Issuance of Shares to Specific Targets” (CSRC License [2023] No. 1595), the Company issued 47,040,000 shares of RMB ordinary shares to specific targets at an issue price of RMB 12.69 per share. The total amount of raised funds is RMB 596,937,600.00. After deducting issuance-related, tax-exclusive fees of RMB 10,849,223.64, the actual net amount of raised funds is RMB 586,088,376.36.

The above funds have been verified upon receipt by Lixin Certified Public Accountants (Special General Partnership), which issued an “Capital Verification Report” (Xin Shi Zi Bao [2024] No. ZA10567). The Company has established special accounts for the raised funds and has signed a tripartite regulatory agreement for raised funds with the sponsor and the commercial bank where the raised funds are deposited.

At present, all of the Company’s raised funds projects are being carried out normally. The Company’s use of idle raised funds for cash management in this instance has not affected the implementation of the raised funds projects.

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Note: “Cumulative investment progress” refers to data as of December 31, 2025.

(IV) Investment methods

1. Investment products

The Company will strictly control risks in accordance with relevant regulations. It will use part of the temporarily idle raised funds to purchase high-safety, good liquidity, low-risk products that meet the principal-protection requirements (including but not limited to agreed deposits, structured deposits, time deposits, large-denomination time deposits, notice deposits, yield certificates, etc.). The product term will not exceed 12 months. Such cash management products shall not be used for pledges, nor for investment activities for the purpose of securities investment.

2. Implementation approach

The board of directors authorizes the Company’s management to fully exercise the decision-making power for cash management investment within the above limits and the validity period of the resolutions, and to sign relevant contract documents, including but not limited to: selecting qualified professional financial institutions, specifying the amount of cash management and the period, selecting product/business types, signing contracts and agreements, etc. Specific matters will be organized and implemented by the Company’s finance department.

3. Allocation of cash management earnings

The earnings obtained by the Company from cash management using idle raised funds will be managed and used strictly in accordance with the requirements of the China Securities Regulatory Commission and the Shanghai Stock Exchange regarding the supervision of raised funds. After the cash management products mature, the proceeds will be returned to the special account for raised funds.

4. Information disclosure

The Company will timely disclose the specific circumstances of its cash management in accordance with the requirements of relevant laws and regulations, including the “Shanghai Stock Exchange Stock Listing Rules,” the “Guidelines for Self-Regulation of Listed Companies on the Shanghai Stock Exchange No. 1—Standardized Operation,” the “Rules for Supervision of Raised Funds of Listed Companies,” and others.

(V) Cash management of raised funds for the last 12 months up to now

For the last 12 months of the Company (from March 31, 2025 to March 30, 2026), the cash management situation of raised funds is as follows:

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II. Review procedures

On March 31, 2026, the Company held the second meeting of the seventh session of the board of directors and approved the Proposal on Using Temporarily Idle Raised Funds for Cash Management. It agreed that, without affecting the construction of raised funds projects and the Company’s normal operations, the Company will reasonably use part of the temporarily idle raised funds for cash management to increase fund returns and help the Company and shareholders obtain more investment returns. The Company will use idle raised funds for cash management with a maximum amount of no more than RMB 38,000 million (including RMB 38,000 million), valid for 12 months from the date the board of directors approves. Within the above limits and the validity period of the relevant resolution, the funds may be used in a revolving and rolling manner.

This matter does not need to be submitted to the shareholders’ meeting for consideration.

III. Analysis of investment risks and risk control measures

(I) Risk analysis

The Company will purchase low-risk, principal-protected wealth management products that have high safety, meet the principal-protection requirements, whose issuing entities can provide a principal-protection commitment, and have good liquidity, and will not affect the normal implementation of the raised funds investment plan. However, the financial market is greatly influenced by macroeconomic factors, and it is not excluded that this investment may be affected by risks such as market fluctuation risk, interest rate risk, liquidity risk, policy risk, information transmission risk, and risk of force majeure. The yield will fluctuate, and the wealth management returns are uncertain.

(II) Risk control measures

1. Strictly follow the prudent investment principle, screen investment counterparties, and choose products issued by entities with good reputation, large scale, and capability to ensure the safety of funds, with good operating performance and strong ability to manage funds.

2. The Company will promptly analyze and monitor the underlying destinations and project progress of wealth management products based on market conditions. If any risk factors are identified that may affect the safety of the Company’s funds, appropriate protective measures will be taken in a timely manner to control investment risks.

3. The Company will timely disclose the specific circumstances of its cash management in accordance with the requirements of relevant laws and regulations, such as the “Rules for Supervision of Raised Funds of Listed Companies” and the “Shanghai Stock Exchange Stock Listing Rules,” as well as the Company’s “Measures for the Management of Raised Funds.”

4. The Company’s independent directors have the right to supervise and inspect the use of funds. If necessary, they may hire professional institutions to conduct audits.

IV. Impact of the investment on the Company

1. The Company’s use of part of temporarily idle raised funds for cash management is implemented on the premise of ensuring that the funds required for investment in the Company’s raised funds projects are available. It is intended to improve the utilization efficiency of temporarily idle raised funds and will not affect the implementation of the Company’s raised funds projects. Through cash management, the Company improves the utilization rate of raised funds, obtains higher interest income, and increases returns for shareholders. It will not cause adverse impact on the Company’s raised funds investment plan, and there is no circumstance of changing the purpose of raised funds or harming the overall interests of the Company and its shareholders.

2. The Company will conduct corresponding accounting treatment for the cash management business in accordance with relevant provisions such as “Accounting Standards for Business Enterprises No. 22—Recognition and Measurement of Financial Instruments” issued by the Ministry of Finance, etc. The specific treatment shall be based on annual audit results.

V. Opinions of the intermediary institution

After verification, Huatai United Securities believes: The Company’s use of part of temporarily idle raised funds for cash management has been approved by the Company’s board of directors and has fulfilled the necessary approval procedures. By investing in wealth management products with high safety and good liquidity, the Company can improve the efficiency of fund utilization. This does not involve any disguised change in the purpose of raised funds, does not affect the normal implementation of the raised funds investment plan, and complies with relevant provisions of the “Rules for Supervision of Raised Funds of Listed Companies,” the “Shanghai Stock Exchange Stock Listing Rules,” the “Guidelines for Self-Regulation of Listed Companies on the Shanghai Stock Exchange No. 11—Continuous Supervision,” the “Guidelines for Self-Regulation of Listed Companies on the Shanghai Stock Exchange No. 1—Standardized Operation,” and the Company’s measures for management of raised funds. The sponsor has no objection to the Company’s use of part of temporarily idle raised funds for cash management.

This is hereby announced.

Board of Directors of Ningbo Heli Technology Co., Ltd.

April 1, 2026

Security code: 603917 Stock abbreviation: Heli Technology Announcement No.: 2026-012

Ningbo Heli Technology Co., Ltd. Announcement on the Temporary Supplement of Working Capital Using Part of Idle Raised Funds

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

Key points:

● Amount of funds to temporarily supplement working capital: RMB 80 million

● Duration of supplementing: no more than 12 months from the date the second meeting of the seventh session of the board of directors approved it on March 31, 2026

I. Basic information on raised funds

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II. Basic information on the raised funds investment projects

As of December 31, 2025, the specific utilization of the raised funds investment projects for the Company’s issuance of A shares to specific targets in 2022 is as follows:

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Note: “Balance of raised funds accounts” refers to the balance in the raised funds bank accounts as of December 31, 2025, and does not include the amount temporarily used to supplement working capital.

III. Plan to temporarily supplement working capital using part of idle raised funds

Since there is a certain period involved in the implementation of raised funds investment projects, and based on the Company’s production and operating needs and financial position, in order to optimize the Company’s capital structure, reduce financial expenses, improve the efficiency of fund utilization, and safeguard the interests of the Company and investors, under the premise of ensuring that the raised funds investment project construction funds’ investment plan is carried out normally, the Company intends, under the principle of maximizing the interests of all shareholders, to use idle raised funds with a maximum amount of no more than RMB 80 million (including RMB 80 million) to temporarily supplement working capital. The usage term shall not exceed 12 months from the date the Company’s board of directors approves it. Before the expiration of the usage term, the Company will promptly and in full return the funds to the corresponding special account for raised funds. During the period when idle raised funds temporarily supplement working capital, if the implementation progress of the relevant raised funds projects exceeds the current expected progress, the Company will promptly return that portion of funds to the raised funds special account by using its own funds or bank loans at any time, to ensure the smooth implementation of the raised funds projects.

The temporary supplement of working capital using part of idle raised funds will be implemented through the special raised funds account, and will be limited to production and operating uses related to the main business. It will not involve any disguised change in the purpose of raised funds, will not affect the normal implementation of the raised funds investment plan, and will not use the above raised funds for new share allotment, subscriptions, or transactions of shares and their derivative varieties, convertible corporate bonds, etc., directly or indirectly.

IV. Board review procedures for this plan to temporarily supplement working capital using part of idle raised funds and whether it complies with regulatory requirements

On March 31, 2026, the Company held the second meeting of the seventh session of the board of directors and approved the Proposal on Using Part of Temporarily Idle Raised Funds to Temporarily Supplement Working Capital. It agreed that the Company will use idle raised funds with a maximum amount of no more than RMB 80 million (including RMB 80 million) to temporarily supplement working capital, and the usage term shall not exceed 12 months from the date the Company’s board of directors approves it.

The relevant review procedures comply with the requirements of laws and regulations including the CSRC’s “Rules for Supervision of Raised Funds of Listed Companies,” the “Shanghai Stock Exchange Stock Listing Rules,” the “Guidelines for Self-Regulation of Listed Companies on the Shanghai Stock Exchange No. 1—Standardized Operation,” and others.

V. Explanation of special opinions

Sponsor’s opinion

After verification, Huatai United Securities believes: The issuer’s use of part of temporarily idle raised funds for the temporary supplement of working capital is beneficial for improving the efficiency of raised funds utilization and reducing the Company’s financial costs; at the same time, it will not affect the normal implementation of the issuer’s raised funds investment projects and there is no conduct of disguised change in the purpose of raised funds. It complies with the interests of the issuer and all shareholders. The issuer’s use of part of temporarily idle raised funds for the temporary supplement of working capital has been approved by the second meeting of the seventh session of the board of directors and has fulfilled the corresponding review procedures. The decision-making procedures for the above matters comply with laws and regulations such as the “Rules for Supervision of Raised Funds of Listed Companies” and the “Guidelines for Self-Regulation of Listed Companies on the Shanghai Stock Exchange No. 1—Standardized Operation,” as well as the relevant provisions of the Company’s “Measures for the Management of Raised Funds.” Therefore, the sponsor has no objection to Heli Technology’s matter of using part of temporarily idle raised funds for the temporary supplement of working capital.

This is hereby announced.

Ningbo Heli Technology Co., Ltd.

Board of Directors

April 1, 2026

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