Comba Telecom Systems Holdings Limited — Proxy Solicitation & Information Statement 2026

Apr 20, 2026

COMBA TELECOM SYSTEMS HOLDINGS LIMITED 京信通信系統控股有限公司

(Incorporated in the Cayman Islands with limited liability)

(Hong Kong Stock Code: 2342)

(Singapore Stock Code: STC)

PROXY FORM

Proxy form for use by the shareholders (the “Shareholder(s)”) of Comba Telecom Systems Holdings Limited (the “Company”) at the annual general meeting (the “Meeting”) to be convened at Unit 611, Building 8W, Hong Kong Science Park, Pak Shek Kok, New Territories, Hong Kong on Thursday, 14 May 2026 at 11:00 a.m. (Hong Kong time) (or any adjournment thereof). I/We (note a)

of being the holder(s) of (note b) ordinary shares (the “ Shares ”) of HK$0.10 each in the share capital of the Company hereby appoint the chairman (the “ Chairman ”) of the Meeting or

of

to act as my/our proxy (note c) at the Meeting to be held at Unit 611, Building 8W, Hong Kong Science Park, Pak Shek Kok, New Territories, Hong Kong on Thursday, 14 May 2026 at 11:00 a.m. (Hong Kong time) and at any adjournment thereof and to vote on my/our behalf as directed below. Please (“✔”) the appropriate box to indicate how you wish your vote(s) to be cast (note d) .

Please (“✔”) the appropriate box to indicate how you wish your vote(s) to be cast (note d).
ORDINARY RESOLUTIONS# FOR AGAINST
1. To receive, consider and adopt the audited consolidated financial statements and the reports of the directors (the “Director(s)”) and the auditor of the Company for the year ended 31 December 2025.
2. (a) To re-elect Ms. Huo Xinru as Director.
(b) To re-elect Mr. Chang Fei Fu as Director.
(c) To re-elect Ms. Ye Ka as Director.
(d) To re-elect Ms. Ng Yi Kum as Director.
(e) To re-elect Dr. Tan Khee Giap as Director.
(f) To authorize the board of Directors (the “Board”) to fix the Directors’ remuneration.
3. To re-appoint Ernst & Young as the auditor of the Company and to authorize the Board to fix their remuneration.
4. To grant the general mandate to the Directors to allot, issue and deal with new Shares (including any sale or transfer of treasury shares) (the “Treasury Shares”) not exceeding 20% of the number of issued Shares (excluding Treasury Shares) in the Company as at the date of this resolution.
5. To grant the general mandate to the Directors to repurchase Shares not exceeding 10% of the number of issued Shares (excluding Treasury Shares) in the Company as at the date of this resolution.
6. To add the number of Shares repurchased by the Company to the mandate granted to the Directors under the resolution no. 4.
SPECIAL RESOLUTION# FOR AGAINST
7. To approve amendments to the existing memorandum and articles of association of the Company (the “Existing Memorandum and Articles of Association”) and to adopt the new amended and restated memorandum and articles of association of the Company in substitution in its entirety for, and to the exclusion of, the Existing Memorandum and Articles of Association.
# The full text of the resolutions is set out in the notice convening the Meeting.
Dated the day of 2026 Shareholder’s signature X X (notes e, f, g, h and i)
Notes:
a. Full name(s) and address(es) are to be inserted in BLOCK CAPITALS.
b. Please insert the number of Shares registered in your name(s). If no number is inserted, this form will be deemed to relate to all the Shares registered in your name(s). c. A proxy need not be a Shareholder. If you wish to appoint some person other than the Chairman as your proxy, please delete the words “the chairman (the “Chairman”) of the Meeting or” and insert the name and address of the person appointed as proxy in the space provided. d. If you wish to vote for any of the resolutions set out above, please tick (“✔”) the boxes marked “FOR”. If you wish to vote against any of the resolutions set out above, please tick (“✔”) the boxes marked “AGAINST”. If this form returned is duly signed but without specific direction on any of the proposed resolution(s), the proxy will vote or abstain at his/her discretion in respect of all resolution(s); or if in respect of a particular proposed resolution there is no specific direction, the proxy will, in relation to that particular proposed resolution, vote or abstain at his/her discretion. A proxy will also be entitled to vote at his/her discretion on any resolution properly put to the Meeting other than those set out in the notice convening the Meeting. e. In the case of a joint holding, this form may be signed by any joint holder, but if more than one joint holder is present at the Meeting, whether in person or by proxy, that one of the joint holder whose name stands first on the register of members of the Company in respect of the relevant joint holding shall alone be entitled to vote in respect thereof. f. The form must be signed by a Shareholder, or his/her attorney duly authorized in writing, or if the Shareholder is a corporation, either under its common seal or under the hand of an officer or attorney so authorized. g. To be valid, this form together with any power of attorney or other authority (if any) under which it is signed or a notarially certified copy of such power or authority must be deposited to the Company’s Hong Kong branch share registrar and transfer office, Computershare Hong Kong Investor Services Limited at 17M/F, Hopewell Centre, 183 Queen’s Road East, Wanchai, Hong Kong no later than Tuesday, 12 May 2026 at 11:00 a.m. (Hong Kong time) or not less than 48 hours before the time appointed for holding of any adjourned meeting. h. Any alteration made to this form should be initialled by the person who signs the form. i. Completion and delivery of this form will not preclude you from attending in person and voting at the Meeting or any adjourned meeting should you so wish. In such event, this form shall be deemed to be revoked.
PERSONAL INFORMATION COLLECTION STATEMENT
“Personal Data” in this statement has the same meaning as “personal data” defined in the Personal Data (Privacy) Ordinance, Chapter 486 of the Laws of Hong Kong (“PDPO”), which include your and your proxy’s name and address. Your supply of the Personal Data is on a voluntary basis and for the purpose of processing your instructions as stated in this form (the “Purposes”). If you fail to supply sufficient information, the Company may not be able to process your instructions. The Company may disclose or transfer the Personal Data to its subsidiaries, its share registrar and/or third party service provider who provides administrative, computer and other services to the Company for use in connection with the Purposes and to such parties who are authorized by law to request the information or are otherwise relevant for the Purposes and need to receive the information. The Personal Data will be retained for such period as may be necessary to fulfil the Purposes (including for verification and record purposes). Request for access to and/or correction of the Personal Data can be made in accordance with the provisions of the PDPO and any such request should be in writing and sent to Personal Data Privacy Officer of Computershare Hong Kong Investor Services Limited at the above address.