China Biotech Services Holdings Limited (CH Biotech Services) announced that its 2025 Annual Report is now available in both English and Chinese on the company’s website (www.cbshhk.com) and on the HKEXnews portal (www.hkexnews.hk).

The notice dated 29 April 2026 sets out the following key points:

• Shareholders who have not previously provided an email address, or whose registered email address is no longer valid, may elect to receive future corporate-communication notifications by email. • To switch to electronic notification, shareholders should complete and return the enclosed reply form to Union Registrars Limited—either by email (8037-corpcomm@unionregistrars.com.hk), by post, or by hand delivery to Suites 3301-04, 33/F, Two Chinachem Exchange Square, 338 King’s Road, North Point, Hong Kong. • Shareholders posting the reply form within Hong Kong can use the pre-paid mailing label provided; overseas mailings require appropriate postage. • Printed copies of corporate communications remain available at no charge upon written request to the company’s Hong Kong share registrar at the same address or via the above email. • For assistance, shareholders may contact Union Registrars during business hours (Monday–Friday, 09:00–17:00, Hong Kong time) on +852 2849 3399.

The company reiterated that these arrangements apply to all future corporate communications—defined to include annual and interim reports, notices of meeting, circulars, proxy forms and any listing documents—until shareholders submit a different written instruction.