POLL RESULTS OF THE ANNUAL GENERAL MEETING HELD ON 30 MAY 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.POLL RESULTS OF THE ANNUAL GENERAL MEETING HELD ON 30 MAY 2024 The Board hereby announces that all the proposed resolutions as set out in the AGM Notice were duly passed by the Shareholders by way of poll at the AGM held on 30 May 2024.The board of directors (the ‘‘Board’’) of Sino-Ocean Service Holding Limited (the ‘‘Company’’) hereby announces that all the proposed resolutions as set out in the notice of the annual general meeting (the ‘‘AGM’’) dated 24 April 2024 (the ‘‘AGM Notice’’) were duly passed by the shareholders of the Company (the ‘‘Shareholders’’) by way of poll at the AGM held on 30 May 2024. As at the date of the AGM the total number of issued shares of the Company (the ‘‘Shares’’) was 1184000000 Shares which was the total number of Shares entitling the Shareholders to attend and vote for or against the resolutions proposed at the AGM. There were no Shares entitling the Shareholders to attend the AGM and abstain from voting in favour of the proposed resolutions as set out in Rule 13.40 of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited (the ‘‘Listing Rules’’) and no Shareholder was required under the Listing Rules to abstain from voting at the AGM. There were no restrictions on any Shareholders casting votes on any of the resolutions proposed at the AGM. No party has stated its intention in the circular of the Company dated 24 April 2024 that it would vote against any resolution or that it would abstain from voting at the AGM.The poll results in respect of the resolutions proposed at the AGM were as follows: Number of Shares Voted Ordinary Resolutions (Percentage) For Against 1. To consider and adopt the audited consolidated 883215500 0 financial statements and the reports of the (100.00%) (0.00%) directors and the auditor for the financial year ended 31 December 2023. 2. To declare a final dividend of RMB0.0144 per 883215500 0 share (equivalent to HKD0.0159 per share (100.00%) (0.00%) rounded to the nearest four decimal places) for the year ended 31 December 2023.Sino-Ocean Service Holding Limited (Incorporated in the Cayman Islands with limited liability) Stock Code : 06677 – 1 –Number of Shares Voted Ordinary Resolutions (Percentage) For Against 3(A). (i) To re-elect Ms. ZHU Geying as executive 883215500 0 director of the Company. (100.00%) (0.00%) (ii) To re-elect Mr. HOU Min as non-executive 883215500 0 director of the Company. (100.00%) (0.00%) (iii) To re-elect Mr. LEUNG Wai Hung as 883215500 0 independent non-executive director of the (100.00%) (0.00%) Company. 3(B). To authorise the board of directors of the 883215500 0 Company to fix the remuneration of the (100.00%) (0.00%) directors of the Company. 4. To re-appoint BDO Limited as auditor of the 883215500 0 Company and authorise the board of directors of (100.00%) (0.00%) the Company to fix its remuneration. 5(A). Ordinary resolution as set out in item 5(A) of the 883215500 0 AGM Notice (To grant a general mandate to the (100.00%) (0.00%) directors to issue shares of the Company). 5(B). Ordinary resolution as set out in item 5(B) of the 883215500 0 AGM Notice (To grant a general mandate to the (100.00%) (0.00%) directors to buy back shares of the Company). 5(C). Ordinary resolution as set out in item 5(C) of the 883215500 0 AGM Notice (To extend the general mandate to (100.00%) (0.00%) the directors to issue shares of the Company).As more than 50% of the votes were cast in favour of each of the resolutions set out above all the resolutions were duly passed as ordinary resolutions by the Shareholders at the AGM.Tricor Investor Services Limited the Company’s Hong Kong branch share registrar was the scrutineer for the vote-taking at the AGM.All directors of the Company attended the AGM.By order of the Board Sino-Ocean Service Holding Limited YANG Deyong Joint Chairman Hong Kong 30 May 2024 As at the date of this announcement the Board comprises Mr. YANG Deyong and Ms. ZHU Geying as executive directors Mr. CUI Hongjie and Mr. HOU Min as non-executive directors and Dr. GUO Jie Mr. HO Chi Kin Sammy and Mr. LEUNG Wai Hung as independent non-executive directors.Sino-Ocean Service Holding Limited (Incorporated in the Cayman Islands with limited liability) Stock Code : 06677 –2–