Du Du Holdings Limited — Proxy Solicitation & Information Statement 2007

Oct 11, 2007

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Core Healthcare Investment Holdings Limited

(incorporated in the Cayman Islands with limited liability)

(Stock Code: 8250)

PROXY FORM

Form of proxy for use by shareholder at the extraordinary general meeting of Core Healthcare Investment Holdings Limited to be convened at Falcon Room I, Basement, Luk Kwok Hotel, 72 Gloucester Road, Wanchai, Hong Kong on Thursday, 1 November 2007 at 3:30 p.m. (or so soon thereafter as the annual general meeting of the Company convened at the same place and date at 3:00 p.m. shall have concluded or adjourned).

I/We, (Note a)

of

being the holder(s) of (Note b) shares of HK$0.01 each in the capital of Core Healthcare Investment Holdings Limited (the “ Company ”), hereby appoint the Chairman of the Meeting or of to

act as my/our proxy (Note c) at the extraordinary general meeting of the Company to be held at Falcon Room I, Basement, Luk Kwok Hotel, 72 Gloucester Road, Wanchai, Hong Kong on Thursday, 1 November 2007 at 3:30 p.m. (or so soon thereafter as the annual general meeting of the Company convened at the same place and date at 3:00 p.m. shall have concluded or adjourned) and to vote on my/our behalf as directed below.

Please tick (“✓”) the appropriate boxes to indicate how you wish your vote(s) to be cast on a poll (Note d) .

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----- Start of picture text ----- FOR AGAINSTTo approve the refreshment of the scheme mandate limit under the shareoption scheme adopted by the Company on 20 April 2004 of up to 10% ofthe shares of the Company in issue as at the date of passing of thisresolution, and that the board of directors of the Company be and arehereby authorised to do all such acts and things and execute all suchdocuments, including under seal where applicable, as they considernecessary or expedient to give effect to foregoing arrangement.----- End of picture text -----

Dated the day of 2007. Shareholder’s signature (Notes e to h)

Notes:

• (a) Full name(s) and address(es) 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 of proxy will be deemed to relate to all the shares in the capital of the Company registered in your name(s).

• (c) A proxy need not be a member of the Company. If you wish to appoint some person other than the Chairman of the Meeting as your proxy, please delete the words “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 the resolutions set out above, please tick (“✓”) the boxes marked “For”. If you wish to vote against any 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 resolutions, the proxy will vote or abstain at his discretion in respect of all resolutions; 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 discretion. A proxy will also be entitled to vote at his 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 of proxy 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 in respect of the relevant joint holding shall alone be entitled to vote in respect thereof.

• (f) This form of proxy must be signed by a shareholder, or his attorney duly authorised in writing, or if the shareholder is a corporation, either under its Common Seal or under the hand of an officer or attorney so authorised.

• (g) To be valid, this form of proxy 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 at the office of the Company’s branch share registrar and transfer office in Hong Kong, Computershare Hong Kong Investor Services Limited at 46th Floor, Hopewell Centre, 183 Queen’s Road East, Hong Kong, not less than 48 hours before the time of the meeting.

• (h) Any alternation made to this form should be initialled by the person who signs the form.