Smart Digital Technology Group Limited — Proxy Solicitation & Information Statement 2004

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SUN INNOVATION HOLDINGS LIMITED

(Incorporated in Bermuda with limited liability)

(Stock Code: 0547)

FORM OF PROXY FOR SPECIAL GENERAL MEETING (OR ANY ADJOURNMENT THEREOF)

I/We [(Note 1)] of being the registered holder(s) of [(Note 2)] share(s) of HK$0.01 each in the capital of abovenamed company (the “Company”) HEREBY APPOINT [(Note 3)] the Chairman of the meeting, or

of

as my/our proxy to attend and vote for me/us and on, my/our behalf at the said meeting of the meeting of the Company to be held at the Ballroom B, 2/F., Langham Hotel Hong Kong, 8 Peking Road, Tsimshatsui, Kowloon on Monday, 28th June 2004 at 10:15 a.m. (or so soon thereafter as the annual general meeting of the Company to be held at the same place and date at 10:00 a.m. shall have been concluded) (or at any adjournment thereof) in respect of the resolution set out in the notice convening the said meeting as hereunder indicated, and, if no such indication is given, as my/our proxy thinks fit.

Dated this day of 2004 Signature(s) [(Note 5)]

Notes:

1. Full name(s) and address(es) to be inserted in BLOCK CAPITALS .

2. Please insert the number of share registered in your name(s). If no number is inserted, this form of proxy will be deemed to relate to all the shares in the capital of the Company registered in your name(s).

3. If any proxy other than the Chairman of the meeting is preferred, delete the words “the Chairman of the meeting”, and insert the name and address of the proxy desired in the space provided. IF NO NAME IS INSERTED, THE CHAIRMAN OF THE MEETING WILL ACT AS PROXY. ANY ALTERATION MADE TO THIS FORM OF PROXY MUST BE INITIALLED BY THE PERSON WHO SIGNS IT.

4. IMPORTANT: IF YOU WISH TO VOTE FOR THE RESOLUTIONS, TICK THE BOX MARKED “FOR”. IF YOU WISH TO VOTE AGAINST THE RESOLUTIONS, TICK IN THE BOX MARKED “AGAINST”. Failure to tick a box will entitle your proxy to cast your vote at his discretion. Your proxy will also be entitled to vote at his discretion on any resolution properly put to the meeting other than those referred to in the notice convening the meeting.

5. To be valid, this form of proxy, together with the 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 at the office of the branch share registrars of the Company, Computershare Hong Kong Investor Services Limited at Rooms 1901-5, 19th Floor, Hopewell Centre, 183 Queen’s Road East, Hong Kong not less than 48 hours before the time for holding the meeting or adjournment meeting.

6. This form of proxy must be signed by you or your attorney duly authorised in writing or, in the case of a corporation, must either be executed under its seal or under the hand of an officer or attorney or other person duly authorised to sign the same.

7. In the case of joint holders of a share, if more than one of such joint holder be present at any meeting the vote of the senior who tenders a vote, whether in person or by proxy, will be accepted to the exclusion of the votes of the other joint holders, and for this purpose, seniority shall be determined by the order in which the names stand in the register in respect of the joint holding.

8. A proxy need not be a member of the Company but must attend the meeting in person to represent you.