CK Infrastructure : NOTIFICATION LETTER TO REGISTERED HOLDER - (1) ANNUAL GENERAL MEETING; AND (2) NOTICE OF PUBLICATION OF ANNUAL REPORT 2020, CIRCULAR DATED 12TH APRIL, 2021, AGM NOTICE, AND PROXY FORM

(Incorporated in Bermuda with limited liability)

（於百慕達註冊成立之有限公司）

(Stock Code 股份代號: 1038)

N O T I F I C AT I O N L E T T E R

12th April, 2021

Dear Shareholder(s),

CK Infrastructure Holdings Limited ("Company")

1. Annual General Meeting ("AGM") of the Company

The AGM of the Company will be held on Wednesday, 12th May, 2021 at 10:00 a.m. at 1st Floor, Harbour Grand Kowloon, 20 Tak Fung Street, Hung Hom, Kowloon, Hong Kong.

Online Attendance at the AGM

In addition to physical attendance, you have the option of attending the AGM online. If you choose to attend the AGM online, you will be able to view a live webcast of the AGM, cast your vote on the resolutions in real time and submit online questions to the Company. From 9:30 a.m. on 12th May, 2021, you can log in to the AGM online platform by visiting https://web.lumiagm.com and e ntering the following:

• Meeting ID : 143-859-194
• Username : your 10-digit shareholder reference number starting with "C" ("SRN") printed under the barcode on the top right corner of this letter
• Password : the five-digit Personal Identification Number (PIN) below the SRN

For corporate shareholders who wish to attend the AGM online, please call Computershare Hong Kong Investor Services Limited, the Company's Branch Share Registrar at its hotline [phone] for arrangement.

You should note that the online platform only permits you to submit your vote in respect of all of the shares you hold and there is no option to submit a vote in respect of part only of the shares you hold. Once the online voting has closed, the vote which you have submitted through the online platform will supersede any vote which may be cast by your proxy (if any) at the AGM.

You are reminded to keep the login details in safe custody and not to disclose them to anyone else. The submission of the vot e through the online platform using your login details will be conclusive evidence that the vote was validly cast by you as a shareholder of the Company. The Company and its agents take no responsibility for all or any loss or other consequence caused by or resulting from any unaut horised use of the login details.

Documents required to be made available at the AGM are accessible from the Company's website (www. cki.com.hk).

2. Notice of publication of (1) Annual Report 2020, (2) Circular dated 12th April, 2021 in relation to the Proposals for Election of Directors at 2021 Annual General Meeting, General Mandates to Issue New Shares and Buy Back Shares and Notice of 2021 Annual

General Meeting ("AGM Notice"), (3) AGM Notice, and (4) Proxy Form (collectively "Current Corporate Communications")

The Company's Current Corporate Communications (both English and Chinese versions) are available on the Company's website at www.cki.com.hk and the website of Hong Kong Exchanges and Clearing Limite d ("HKEX") at www.hkexnews.hk. You may access the Current Corporate Communications by clicking "Investor Information" on the home page of the Company's website or by searching under " Listed Company Information" on the website of HKE X. Viewing the above documents requires Adobe® Reader®. The printed form(s) of Current Corporate Communications is/are enclosed (if applicable) .

Shareholders who have chosen (or are deemed to have consented) to read the Company's Corporate Communications (Note) published on the Company's website in place of receiving printed copie s thereof may request the printed copy of the Current Corporate Communications. Shareholders for any reason have difficulty in receiving or gaining access to the Current Corporate Communications posted on the Company's website will upon request in writing promptly be sent the Current Corporate Communications in printed form free of charge. Shareholders who have received either the English or the Chinese version of the Current Corporate Communications may also request a copy in the other language .

If you want to request printed version(s) of the Current Corporate Communications, please complete the Request Form enclosed with this letter and send it to the Company c/o its Branch Share Registrar, Computershare Hong Kong Investor Services Limited, using the mailing label and need not affix a stamp when returning (if posted in Hong Kong). Otherwise, please affix an appropriate stamp. The address of Computershare Hong Kong Investor Services Limited is 17M Floor, Hopewell Centre, 183 Queen's Road East, Hong Kong. You may also send your request to [e-mail]. The Request Form may also be downloaded from the Company's website at www.cki.com.hk by clicking "Investor Information" on the home page, then selecting "Request Form For Registered Holder" under "Annual Reports", or the website of HKEX at www.hkexnews.hk.

Please note that you are entitled to change your choice as to the means of receipt (i.e. in printed form or by electronic means through the Company's website) and/or the language of the Company's Corporate Communications at any time by reasonable prior notice in writing to the Company c/o its Branch Share Registrar or sending a notice to [e-mail].

Should you have any queries relating to this letter, please contact the Company's Branch Share Registrar, Computershare Hong Kong Investor Services Limited by telephone at (852) 2862 8558.

Yours faithfully,

CK Infrastructure Holdings Limited

Note: Corporate Communications include but are not limited to (a) the directors' report, its annual accounts together with a copy of the auditors' report and, where applicable, its summary financial report; (b) the interim report and, where applicable, its summary interim report; (c) a notice of meeti ng;

(d) a listing document; (e) a circular; and (f) a proxy form.