Internal Control Audit Report
Audit Report No. ZI10033
To all shareholders of Shenzhen Institute of Building Science Co., Ltd.:
In accordance with the "Guidelines for Internal Control Audits" and relevant requirements of the Chinese Certified Public Accountant (CPA) professional standards, we have audited the effectiveness of internal controls over the financial report of Shenzhen Institute of Building Science Co., Ltd. (hereinafter referred to as "the Institute") as of December 31, 2025.