Announcement on Re-appointment of the Company's 2026 Audit Firm

Securities Code: 002390 Securities Abbreviation: Xinbang Pharmaceutical Announcement Number: 2026-008 Guizhou Xinbang Pharmaceutical Co., Ltd. Announcement on Re-appointment of the Company's 2026 Audit Firm The Company and all members of the Board of Directors guarantee that the content of the information disclosure is true, accurate, and complete, and that there are no false records, misleading statements, or major omissions. Special Reminder: The matter of re-appointing the 2026 audit firm complies with the "Measures for the Selection and Appointment of Accounting Firms by State-owned Enterprises and Listed Companies" (Cai Kuai [2023] No. 4). Guizhou Xinbang Pharmaceutical Co., Ltd. (hereinafter referred to as the "Company") reviewed and approved the "Proposal on Re-appointing the Company's 2026 Audit Firm" at the tenth meeting of the Ninth Board of Directors held on April 17, 2026. This matter still needs to be submitted to the Company's 2025 Shareholders' Meeting for review. The relevant matters are hereby announced as follows: I. Basic Information of the Proposed Appointed Accounting Firm (I) Firm Information

1. Basic Information Firm Name Date of Establishment Organizational Form Registered Address Managing Partner Number of Partners as of December 31, 2022 Number of Certified Public Accountants as of December 31, 2022 Of which: Number of Certified Public Accountants who have signed audit reports for securities service business Beijing Dehao International Certified Public Accountants (Special General Partnership) December 8, 2008 Special General Partnership 5th Floor, Room 519A, 31 Fuchengmenwai Street, Xicheng District, Beijing Zhao Huanqi 72 296 165

1. Investor Protection Capability The balance of the professional liability reserve at the end of the previous year was 105.35 million yuan; the cumulative compensation limit of purchased professional liability insurance is 300 million yuan; the provision for the professional liability reserve and the purchase of professional liability insurance comply with relevant regulations. Beijing Dehao International Certified Public Accountants (Special General Partnership) (hereinafter referred to as "Beijing Dehao International") has not been subject to civil liability for litigation related to its practice in the past three years.
2. Integrity Record As of December 31, 2025, Beijing Dehao International has received 0 criminal penalties, 0 administrative penalties, 2 administrative supervision measures, 0 self-regulatory measures, 0 disciplinary actions, and 0 industry sanctions for its practice in the past three years; during this period, 32 practitioners have received 24 administrative supervision measures, 6 self-regulatory measures, 2 administrative penalties, 1 disciplinary action, and 1 industry sanction for their practice (excluding 1 administrative supervision measure, 1 administrative penalty, and 1 industry sanction, the rest were not during the practice period at Beijing Dehao International). (II) Project Information
3. Basic Information Proposed Project Partner: Wang Xiaoming, became a certified public accountant in December 2002, began engaging in listed company audits in January 2001, and began practicing at Beijing Dehao International in December 2023.

In December 2021, he began providing audit services to this company. In the past three years, he has signed audit reports for 5 listed companies and reviewed audit reports for 4 listed companies. Proposed Signing Certified Public Accountant: Qian Yurong, became a certified public accountant in January 2022, began engaging in listed company audits in February 2020, and began practicing at Beijing Dehao International in December 2023. He is scheduled to begin providing audit services to this company in December 2026. In the past three years, he has signed audit reports for 0 listed companies and reviewed audit reports for 0 listed companies. Proposed Quality Control Reviewer: Huang Haiyang, became a certified public accountant in February 2014, began engaging in listed company audits in February 2014, and began practicing at Beijing Dehao International in December 2023. He is scheduled to begin providing audit services to this company in January 2025. In the past three years, he has signed audit reports for 2 listed companies and reviewed audit reports for 7 listed companies. 2. Integrity Record The project partner, signing certified public accountant, and project quality control reviewer have not been subject to criminal penalties for their practice in the past three years, nor have they received administrative penalties or supervision measures from the China Securities Regulatory Commission and its dispatched agencies, or administrative penalties, supervision measures, disciplinary actions, or other sanctions from industry associations or self-regulatory organizations. 3. Independence Beijing Dehao International Certified Public Accountants and its project partners, signing certified public accountants, project quality control reviewers, and other practitioners do not violate the independence requirements stipulated in the "Code of Professional Ethics for Certified Public Accountants of China". 4. Audit Fees The audit service fees are determined based on the company's business scale, industry, and complexity of accounting treatment, as well as the audit personnel required for the company's annual audit and the workload invested, and the firm's fee standards. The audit fee for 2025 is 129 million yuan (including internal control audit fees). The Board of Directors requests the Shareholders' Meeting to authorize the Company's management to determine the 2026 audit fee and sign relevant contracts and documents based on market conditions and negotiations between the two parties. II. Procedures Performed by the Proposed Appointed Accounting Firm (I) Performance of Duties by the Board of Directors' Audit Committee The tenth meeting of the Ninth Board of Directors' Audit Committee held on April 13, 2026, reviewed and approved the "Proposal on Re-appointing the Company's 2026 Audit Firm" with 3 votes in favor, 0 votes against, and 0 abstentions. The Audit Committee believes that Beijing Dehao International possesses rich experience and professional ethics in auditing listed companies, has the professional capability, independence, and investor protection capability for auditing, and can ensure the independence and objectivity of the company's audit work. The Audit Committee agreed to re-appoint Beijing Dehao International as the company's 2026 audit firm and agreed to submit this matter to the tenth meeting of the Ninth Board of Directors for review. (II) Review and Voting of the Proposal by the Board of Directors The tenth meeting of the Ninth Board of Directors of the Company, held on April 17, 2026, reviewed and approved the "Proposal on Re-appointing the Company's 2026 Audit Firm" with 8 votes in favor, 0 votes against, and 0 abstentions. (III) Effective Date The matter of re-appointing the 2026 audit firm still needs to be submitted to the Company's 2025 Shareholders' Meeting for review and will take effect from the date of approval by the Shareholders' Meeting. III. Documents for Reference (I) "Resolution of the Tenth Meeting of the Ninth Board of Directors"; (II) "Resolution of the Tenth Meeting of the Ninth Board of Directors' Audit Committee"; (III) Explanation of the basic situation of Beijing Dehao International Certified Public Accountants (Special General Partnership). Hereby announced. Guizhou Xinbang Pharmaceutical Co., Ltd. Board of Directors April 21, 2026