POLL RESULTS OF THE ANNUAL GENERAL MEETINGHELD ON 7 JUNE 2024

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.* (Incorporated in Bermuda with limited liability) (Stock Code: 632) POLL RESULTS OF THE ANNUAL GENERAL MEETING HELD ON 7 JUNE 2024 Reference is made to the circular of CHK Oil Limited (the “Company”) dated 26 April 2024 (the “Circular”) and the notice of annual general meeting of the Company dated 26 April 2024 (the “AGM Notice”). Unless otherwise specified capitalised terms used herein have the same meanings ascribed to them in the Circular.RESULTS OF THE AGM The Board is pleased to announce that the proposed resolutions set out in the AGM Notice were duly passed by the Shareholders by way of poll at the AGM held on 7 June 2024.POLL RESULTS OF THE ANNUAL GENERAL MEETING As at the date of the AGM the number of issued shares of the Company was 841879482 which was the total number of shares entitling the Shareholders to attend and vote for or against the proposed resolutions as set out in the AGM Notice (the “Proposed Resolutions”) at the AGM.There were no Shares entitling the Shareholders to attend and abstain from voting in favour of the Proposed Resolutions at the AGM as set out in Rule 13.40 of the Rules Governing the Listing of Securities on the Stock Exchange (the “Listing Rules”). None of the Shareholders were required under the Listing Rules to abstain from voting on the Proposed Resolutions at the AGM. None of the Shareholders have stated in the Circular their intention to vote against or to abstain from voting on any of the Proposed Resolutions at the AGM.All Directors (other than Ms. Chen Junyan) of the Company attended the AGM in person or by electronic means.* For identification purpose only – 1 –Tricor Tengis Limited the Hong Kong branch share registrar of the Company was appointed and acted as the scrutineer for the vote-taking at the AGM. The poll results in respect of all the Proposed Resolutions put to vote at the AGM are set out as follows: Number of voted cast (approximate percentage of Ordinary Resolutions total number of votes cast) For Against 1. To receive consider and adopt the audited consolidated 611108244 0 financial statements and the reports of the directors (100%) (0%) and auditors of the Company for the year ended 31 December 2023. 2. (i) (a) To re-elect Mr. Zheng Ye as a non-executive 611108194 50 Director; (99.99%) (0.01%) (b) To re-elect Ms. Zhong Bifeng as an 611108194 50 independent non-executive Director; (99.99%) (0.01%) (c) To re-elect Ms. Huang Qingwei as an 611108194 50 independent non-executive Director; (99.99%) (0.01%) (d) To re-elect Mr. Shen Shigang as an 611108194 50 independent non-executive Director; (99.99%) (0.01%) (e) To re-elect Ms. Lam Shuk Yi Mariana as an 611108194 50 independent non-executive Director. (99.99%) (0.01%) (ii) To authorize the board of Directors to fix the 611108194 50 Directors’ remuneration. (99.99%) (0.01%) 3. To re-appoint the retiring auditors and to authorise 611108244 0 the board of Directors to fix the remuneration of the (100%) (0%) auditors of the Company.– 2 –Number of voted cast (approximate percentage of Ordinary Resolutions total number of votes cast) For Against 4. (A) To grant an unconditional mandate to the Directors 611108194 50 to allot issue and deal with additional shares of (99.99%) (0.01%) the Company up to a maximum of 20% of the issued share capital of the Company as at the date of passing this resolution. (B) To grant an unconditional mandate to the Directors 611108194 50 to buy back on The Stock Exchange of Hong (99.99%) (0.01%) Kong Limited the shares of the Company up to a maximum of 10% of the issued share capital of the Company as at the date of passing this resolution. (C) To extend the mandate granted to the Directors 611108194 50 by adding those shares that may be bought back (99.99%) (0.01%) under resolution no. 4(B) pursuant to resolution no. 4(A).As more than 50% of the votes were cast in favour of the above ordinary resolutions numbered 1 to 4 the above ordinary resolutions were duly passed by the Shareholders at the AGM. By Order of the Board CHK Oil Limited Yu Jiyuan Chairman and Executive Director Hong Kong 7 June 2024 As at the date of this announcement the Board comprises five executive Directors namely Mr. Yu Jiyuan Mr. Yu Zhibo Mr. Jin Ailong Ms. Yang Yuyan and Ms. Sun Xiaoze and three non-executive Directors Mr. Lin Qing Yu Ms. Chen Junyan and Mr. Zheng Ye and four independent non-executive Directors namely Ms. Zhong Bifeng Ms. Huang Qingwei Mr. Shen Shigang and Ms. Lam Shuk Yi Mariana.–3–