China Molybdenum : SUPPLEMENTAL NOTICE OF THE 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 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 notice.

(Stock Code: 03993)

SUPPLEMENTAL NOTICE OF

THE ANNUAL GENERAL MEETING

We refer to the circular (the "Original Circular") and the notice (the "Original Notice") of the 2020 annual general meeting (the "AGM") of China Molybdenum Co., Ltd.* (the "Company") dated 20 April 2021, which set out the details of the resolutions to be proposed at the AGM for shareholders' approval.

SUPPLEMENTAL NOTICE IS HEREBY GIVEN that the AGM will be held as originally scheduled at 1:00 p.m. on Friday, 21 May 2021 at the Mudu-Lee Royal International Hotel, Kaiyuan Street, No. 239 Luolong District, Luoyang City, Henan Province, the People's Republic of China (the "PRC") for the purpose of considering and, if thought fit, following resolutions as special resolutions in addition to the resolutions set out in the Original Notice:

SPECIAL RESOLUTIONS

23 "To consider and approve the Proposal Relating to the 2021 First Phase of the Employee Share Ownership Plan of the Company (Draft) and its Summary."

24. "To consider and approve the Proposal Relating to the Administrative Measures for the 2021 First Phase of the Employee Share Ownership Plan of the Company."

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25. "To consider and approve the Proposal Relating to the Authorization from Shareholders' General Meeting for the Board to Handle Matters in Relation to the 2021 First Phase of the Employee Share Ownership Plan of the Company."

By Order of the Board

China Molybdenum Co., Ltd.*

Yuan Honglin

Chairman

Luoyang City, Henan Province, the PRC, 5 May 2021

As at the date of this notice, the Company's executive directors are Mr. Li Chaochun and Mr. Li Faben; the non-executive directors are Mr. Yuan Honglin, Mr. Guo Yimin and Mr. Cheng Yunlei; and the independent non-executive directors are Mr. Wang Gerry Yougui, Ms. Yan Ye and Mr. Li Shuhua.

Notes:

1. Details of the above resolutions are set out in the supplemental circular of the Company dated 5 May 2021 (the "Supplemental Circular"). Unless otherwise defined in this supplemental notice of the AGM, capitalised terms used in this supplemental notice of the AGM shall have the same meanings as those defined in the Supplemental Circular.
2. A supplemental form of proxy (the "Supplemental AGM Form of Proxy") for the AGM containing the resolutions mentioned above is enclosed with the Supplemental Circular. The form of proxy dated 20 April 2020 issued by the Company for the AGM along with the Original Circular (the "Original AGM Form of Proxy") will remain valid and effective to the fullest extent applicable if correctly completed and lodged with the H share registrar of the Company.
3. Shareholders are entitled to appoint one or more proxies to attend the AGM, but only one of the proxies can be designated to vote at the AGM. For the avoidance of doubt, should the proxies being appointed to attend the AGM under each of the Original AGM Form of Proxy and/or the Supplemental AGM Form of Proxy are different and more than one of the proxies attend the AGM, only the proxy validly appointed under the Original AGM Form of Proxy shall be designated to vote at the AGM.
4. To be valid, the Supplemental AGM Form of Proxy together with the power of attorney (if any) and other relevant authorization document(s) (if any) which have been notarized shall be deposited at the H share registrar of the Company, Computershare Hong Kong Investor Services Limited, at the address stated in note (5) below, not less than 24 hours before the time designated for the AGM. Completion and return of the Supplemental AGM Form of Proxy will not preclude the holders of H shares from attending and voting at the AGM or any adjourned meeting should they so wish.

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1. The address and contact details of the H share registrar of the Company, Computershare Hong Kong Investor Services Limited, are as follows:
   17M Floor Hopewell Centre
   183 Queen's Road East Wanchai
   Hong Kong
   Telephone No.: ([phone]
   Facsimile No.: ([phone]/([phone]
2. The address and contact details of the Company's office of the Board at its principal place of business in the PRC are as follows:
   North of Yihe Huamei Shan Road Chengdong New District Luanchuan County Luoyang City
   Henan Province
   The People's Republic of China Postal code: 471500
   Telephone No.: ([phone]
   Facsimile No.: ([phone]
   E-mail address: [e-mail]
3. The AGM is expected to last not more than one day. Shareholders or proxies attending the AGM are responsible for their own transportation and accommodation expenses.

• For identification purposes only

The Supplemental Circular ("Circular") in Chinese and English version has been published on the Company's website (http://www.cmoc.com). Shareholders who choose to receive the corporate communications of the Company (including but not limited to annual reports, summary financial reports (if applicable), interim reports, interim summary reports (if applicable), notice of meeting, listing documents, circulars and forms of proxy) and have difficulties in receiving corporate communications published on the Company's website for any reason can request for the free printed Circular sent by post. Shareholders can change the way of receiving the corporate communications of the Company and the selection of language version at any time.

Shareholders can request for the printed Circular or to change the way of receiving the corporate communications of the Company and the selection of language version by giving a written notice to the Company within a reasonable period of time. Such written notice should be given to the share registrar for H shares of the Company, i.e. Computershare Hong Kong Investor Services Limited (address: 17M Floor, Hopewell Centre, 183 Queen's Road East, Wanchai, Hong Kong), or e-mail to [e-mail].

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