Announcement of Tonghua Dongbao on Re-appointment of Accounting Firm

Securities code: 600867 Securities abbreviation: Tonghua Dongbao Announcement number: 2026-021 Tonghua Dongbao Pharmaceutical Co., Ltd.

Announcement on Re-appointment of Accounting Firm

The company's board of directors and all directors guarantee that the contents of this announcement do not contain any false records, misleading statements or major omissions, and assume legal responsibility for the authenticity, accuracy and completeness of its contents.

Important content reminder:

 Name of the accounting firm to be re-appointed: Daxin Accounting Firm (Special General Partnership)

Tonghua Dongbao Pharmaceutical Co., Ltd. (hereinafter referred to as the "Company") held the 24th meeting of the 11th Board of Directors on April 17, 2026, and reviewed and approved the "Proposal on Re-appointing Daxin Accounting Firm (Special General Partnership) as the Company's Financial Report Auditing Agency and Internal Control Auditing Agency for 2026", and plans to re-appoint Dasin Accounting Firm (Special General Partnership) (hereinafter referred to as "Daxin Accounting Firm" or "Daxin") as the company's 2026 Annual financial report audit agency and internal control audit agency. This proposal still needs to be submitted to the company’s shareholders’ meeting for review. The specific information is now announced as follows:

1. Basic information on the proposed re-appointment of the accounting firm

(1) Institutional information

1. Basic information

Daxin Accounting Firm was established in 1985 and converted into a special general partnership in March 2012. It is headquartered in Beijing and its registered address is Room 2206, Floor 22, No. 1 Zhichun Road, Haidian District, Beijing. Dasin has 33 branches across the country and a branch in Hong Kong. In 2017, Dasin launched the Dasin International Accounting Network, which currently has 39 network member firms in the United States, Canada, Australia, Germany, France, the United Kingdom, and Singapore. Dasin is one of the earliest accounting firms engaged in securities services in my country. It was among the first to obtain the audit qualification for H-share companies and has more than 30 years of experience in the securities business.

2.Personnel information

The chief partner is Mr. Xie Zemin. As of December 31, 2025, Dasin had a total of 3,914 employees, including 182 partners and 1,053 certified public accountants. Among CPAs, more than 500 have signed securities service business audit reports.

3.Business information

Business revenue in 2024 is 1.575 billion yuan, providing services to more than 10,000 companies. Among the business income, audit business income was 1.378 billion yuan, of which securities business income was 405 million yuan. There are 221 audit clients for the annual reports of listed companies in 2024 (including H shares), with average assets of 19.544 billion yuan and total fees of 282 million yuan. Mainly distributed in manufacturing, information transmission, software and information technology services, electricity, heat, gas and water production and supply industries, scientific research and technical services, water conservancy, environment and public facilities management industries. Audit clients of 9 listed companies in the same industry.

4. Investor protection capabilities

The sum of the cumulative compensation limit of occupational insurance and the accrued occupational risk fund exceeds 200 million yuan. The accrual of the occupational risk fund and the purchase of occupational insurance comply with relevant regulations.

In the past three years, Daxin has borne civil liability due to its professional activities, including Changxin Agricultural Loan and other four auditing businesses. The investor litigation amount totaled 5.8151 million yuan, all of which have been fulfilled. Civil compensation liabilities can be covered by professional insurance.

5. Integrity record

As of December 31, 2025, in the past three years, he had received 0 criminal penalties, 10 administrative penalties, 16 administrative supervision measures, and 18 self-regulatory supervision measures and disciplinary sanctions due to his professional conduct. In the past three years, 67 employees received 0 criminal penalties, 25 administrative penalties, 34 administrative supervision measures, and 46 self-regulatory measures and disciplinary sanctions due to their professional behavior in the past three years.

(2) Project information

1. Basic information

Whether you have been engaged in certification? Basic information in other units: name, professional qualifications

Part-time job voucher service business

Signature Project Partner Wang Shuqi CPA Yes No Signature CPA Zhang Zhongwei CPA Yes No Quality Control Reviewer Wu Xiuying CPA Yes None

(1) Signing project partner: Mr. Wang Shuqi, who became a Chinese Certified Public Accountant in 2004, began to engage in the audit business of listed companies in 2006, began practicing at Daxin Accounting Firm in 2013, and began to provide audit services for the company in 2025. In the past three years, he has signed securities business reports such as Changchun High-tech Industry (Group) Co., Ltd., has nearly 20 years of experience in the securities industry, and has professional competence.

(2) Signing Certified Public Accountant: Mr. Zhang Zhongwei, who began to engage in securities services such as auditing listed companies in 2001, became a Chinese Certified Public Accountant in 2004, began practicing at Daxin Accounting Firm in 2025, and began to provide audit services to the company in 2025. He has provided audit and other professional services to a number of listed companies. He has nearly 25 years of experience in the securities industry and is professionally competent.

(3) Project quality reviewer: Ms. Wu Xiuying, who has the qualification of a certified public accountant. He became a certified public accountant in 2008, began to engage in audit quality review of listed companies in 2019, started practicing at Dasin in 2013, and began to provide audit services for companies in 2025. In the past three years, we have reviewed the audit reports of listed companies such as Changchun High-tech, Baike Biotechnology, Changchun Gas, Jilin Aolaide and other listed companies. Not working part-time in other units.

2. Integrity record

In the past three years, the project partners to be signed, the signing certified public accountants and the quality review personnel have not been subject to criminal penalties for professional conduct, administrative penalties, supervisory and management measures from the China Securities Regulatory Commission, dispatched agencies, and industry authorities, or self-regulatory measures and disciplinary sanctions from self-regulatory organizations such as stock exchanges and industry associations. 3. Independence

The project partners to be signed, the signing certified public accountants and the quality review personnel do not violate the independence requirements of the "Chinese Code of Professional Ethics for Certified Public Accountants", do not hold or trade company stocks, and do not have other economic interests that affect independence. Regular rotation complies with regulations.

4. Audit fees

The company determines specific audit fees based on annual report workload and market-based pricing principles. The audit fee for 2025 is 1.5 million yuan (tax included), including: financial report audit fee 1 million yuan (tax included), and internal control audit fee 500,000 yuan (tax included).

The company's board of directors requested the company's shareholders' meeting to authorize the company's management to determine the final actual financial report audit fees and internal control audit fees with the accounting firm based on the company's specific audit requirements and audit scope for 2026.

2. Procedures to be followed by the accounting firm to be re-appointed

(1) Opinions of the Audit Committee of the Board of Directors

The Audit Committee of the company's board of directors conducted a careful and comprehensive review of the basic information of Daxin Accounting Firm hired by the company and concluded that Daxin Accounting Firm has the corresponding professional qualifications and competencies. During its tenure as the company's audit agency, it was able to objectively and independently audit the company's financial status and internal control, and met the requirements of the company's financial and internal control audit work. In order to maintain the continuity of the company's audit work, the Audit Committee of the company's board of directors unanimously agreed to renew the appointment of Daxin Accounting Firm as the company's 2026 financial report and internal control audit agency for a period of one year. and submit the above proposal to the company's board of directors for review.

(2) The board of directors considers the renewal of the accounting firm

The company held the 24th meeting of the 11th board of directors on April 17, 2026. With 9 votes in favor, 0 votes against, and 0 abstentions, the "Proposal on Re-appointing Daxin Accounting Firm (Special General Partnership) as the Company's 2026 Financial Report Audit Agency and Internal Control Audit Agency" was reviewed and approved. The company's board of directors unanimously agreed to renew the appointment of Daxin Accounting Firm as the company's 2026 financial report auditor and internal control auditor for a period of one year. The audit fee is 1.5 million yuan (tax included), including: financial report audit fee 1 million yuan (tax included) and internal control audit fee 500,000 yuan (tax included). There was no change in audit fees compared with the previous period.

(3) The proposal to re-appoint the accounting firm still needs to be submitted to the company’s shareholders’ meeting for review and will take effect from the date of review and approval by the company’s shareholders’ meeting.

Announcement is hereby made.

Board of Directors of Tonghua Dongbao Pharmaceutical Co., Ltd.

April 20, 2026