PegBio Co., Ltd. — Regulatory Filings 2012

May 9, 2012

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement.

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BEIJING YU SHENG TANG PHARMACEUTICAL GROUP LIMITED * 北京御生堂藥業集團有限公司

(Incorporated in Bermuda with limited liability)

(Stock Code: 1141)

PROFIT WARNING

This announcement is made by the Company pursuant to Rule 13.09(1) of the Listing Rules.

The Board wishes to inform the Shareholders and potential investors that, based on a preliminary review of the Group’s unaudited management accounts, the Group is expected to record a loss for the year ended 31 March 2012 which is higher than that for the year ended 31 March 2011.

Shareholders and potential investors are advised to exercise caution when dealing in the shares of the Company.

This announcement is made by Beijing Yu Sheng Tang Pharmaceutical Group Limited (the “Company”, together with its subsidiaries, the “Group”) pursuant to Rule 13.09(1) of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited (the “Listing Rules”).

The Board of Directors (“Board”) of the Company wishes to inform the shareholders of the Company (the “Shareholders”) and potential investors that, based on a preliminary review of the Group’s unaudited management accounts, the Group is expected to record a loss for the year ended 31 March 2012 which is higher than that for the year ended 31 March 2011. Such expected loss is mainly attributable to the realised and unrealised loss of investments in listed equity securities.

The Company is in the process of finalizing the annual results of the Group for the year ended 31 March 2012. The information contained in this announcement is only a preliminary assessment by the Board according to the unaudited management accounts of the Group and is not based on any financial figures or information which have been audited or reviewed by the Company’s auditors. Further details of the Group’s financial results and performance will be disclosed in the Company’s annual results announcement to be published in late June 2012.

Shareholders and potential investors are advised to exercise caution when dealing in the shares of the Company.

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By Order of the Board Suen Cho Hung, Paul Chairman

Hong Kong, 9 May 2012

As at the date of this announcement, the Board comprises Mr. Suen Cho Hung, Paul (Chairman), Mr. Sue Ka Lok (Chief Executive Officer), Mr. Bai Jianjiang and Ms. Lee Chun Yeung, Catherine as Executive Directors and Mr. Wong Kwok Tai, Mr. Weng Yixiang and Mr. Lu Xinsheng as Independent Non-executive Directors.

• For identification purpose only

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