Announcement on Abnormal Stock Trading Fluctuations

Hebei Changshan Biochemical Pharmaceutical Co., Ltd.·June 17, 2026·2 pages

✨ AI Summary

Hebei Changshan Biochemical Pharmaceutical Co., Ltd. announces abnormal stock trading fluctuations due to a cumulative price drop exceeding 30% over three trading days. The company has verified no undisclosed material information, no public media reports impacting stock price, and normal business operations. The listing application for Ecnaphantide Injection is still under review, with uncertain approval outcomes.

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Securities Code: 300255 Securities Abbreviation: Changshan Pharmaceutical Announcement No.: 2026-24

Hebei Changshan Biochemical Pharmaceutical Co., Ltd. Announcement on Abnormal Stock Trading Fluctuations

The Company and its entire Board of Directors guarantee the content of this information disclosure is true, accurate, and complete, with no false records, misleading statements, or major omissions.

I. Introduction to Abnormal Stock Trading Fluctuations

Hebei Changshan Biochemical Pharmaceutical Co., Ltd. (hereinafter referred to as the "Company") experienced abnormal stock trading fluctuations, with its closing price cumulative deviation exceeding 30% over three consecutive trading days (June 15, 2026, June 16, 2026, and June 17, 2026). In accordance with the relevant regulations of the Shenzhen Stock Exchange, this constitutes abnormal stock trading fluctuations.

II. Company's Attention and Verification

Regarding the abnormal stock trading fluctuations, the Company has investigated relevant matters and provides the following explanation:

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