SUPPLEMENTAL NOTICE OF ANNUAL GENERAL MEETING

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this supplemental notice 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 supplemental notice.CHINA MENGNIU DAIRY COMPANY LIMITED 中国蒙牛乳业有限公司* (Incorporated in the Cayman Islands with limited liability) (Stock Code: 2319) SUPPLEMENTAL NOTICE OF ANNUAL GENERAL MEETING Reference is made to the circular of China Mengniu Diary Company Limited (the ‘‘Company’’) dated 29 April 2024 (the ‘‘Circular’’) and the notice of annual general meeting (the ‘‘Original Notice’’) of the Company dated 29 April 2024 by which the Company convenes an annual general meeting of the Company (the ‘‘Annual General Meeting’’) to be held at Ballroom Level 3 JW Marriott Hotel Hong Kong Pacific Place 88 Queensway Hong Kong at 11 : 00 a.m. on Wednesday 12 June 2024. This supplemental notice shall be read together with the Original Notice.Details of the proposed resolutions to be considered at the Annual General Meeting were stated in the Original Notice. Unless otherwise stated terms defined herein shall have the same meanings as those defined in the Circular. Apart from the amendments stated below all the information contained in the Original Notice remains to have full force and effect and this supplemental notice shall be read together with the Original Notice.* For identification purpose only – 1 –SUPPLEMENTAL NOTICE IS HEREBY GIVEN THAT the Annual General Meeting will be held as originally scheduled. In addition to the resolutions set out in the Original Notice the Annual General Meeting will be held to consider and if thought fit pass the following resolution: ORDINARY RESOLUTION 3. To re-elect the following directors and authorise the board of directors of the Company to fix their remuneration: (d) Mr. Qing Lijun.By order of the Board Kwok Wai Cheong Chris Company Secretary Hong Kong 27 May 2024 Notes: (1) A second proxy form (the ‘‘Revised Proxy Form’’) containing the ordinary resolution number 3(d) is enclosed with the supplemental circular of the Company dated 27 May 2024 (the ‘‘Supplemental Circular’’). Please refer to the section headed ‘‘Supplemental Notice of Annual General Meeting and Revised Proxy Form’’ on pages 3 to 4 of the Supplemental Circular for arrangements on the completion and submission of the Revised Proxy Form. (2) Save for the above supplemental resolution there are no other changes to the resolutions set out in the Original Notice. Please refer to the Original Notice for details of the other resolutions to be considered at the Annual General Meeting closure of the register of members of the Company and eligibility for attending the Annual General Meeting and other relevant matters. (3) With reference to resolution 3(d) above Mr. Qing Lijun will retire in accordance with the articles of association of the Company. Mr. Qing will being eligible offer himself for re-election at the Annual General Meeting. Details of the above Director are set out in the Supplemental Circular.As at the date of this supplemental notice the Board comprises: Mr. Jeffrey Minfang Lu Mr. Gao Fei and Ms. Wang Yan as executive directors; Mr. Qing Lijun Mr. Wang Xi and Mr. Simon Dominic Stevens as non-executive directors; and Mr. Yih Dieter (alias Yih Lai Tak Dieter) Mr. Li Michael Hankin and Mr. Ge Jun as independent non-executive directors.–2–