XUANZHUBIO-B (02575) announced that, according to the quarterly review results of the Hang Seng Index Series for the period ending December 31, 2025, released by Hang Seng Indexes Company Limited on February 13, 2026, the company has been included as a constituent of the Hang Seng Composite Index. This adjustment will take effect officially on March 9, 2026. The Hang Seng Composite Index serves as a comprehensive benchmark for the Hong Kong stock market, covering the top 95% of listed companies by cumulative market capitalization on the Main Board of The Stock Exchange of Hong Kong. Being included as a constituent of the Hang Seng Composite Index is expected to make the company's shares eligible for inclusion in the Stock Connect programs between Shanghai, Shenzhen, and Hong Kong. These programs are channels for stock trading and investment between investors in Hong Kong and mainland China. The Board of Directors believes that the inclusion reflects investor recognition of the company's value and growth potential. The Board anticipates that the inclusion will enhance the stock's liquidity, broaden the investor base, and diversify the shareholder structure, thereby further elevating the company's reputation and investment value in the capital markets and supporting its long-term, stable development.