Du Du Holdings Limited — Proxy Solicitation & Information Statement 2009

Feb 26, 2009

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CORE HEALTHCARE INVESTMENT HOLDINGS LIMITED 確思醫藥投資控股有限公司*

(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 Shop No. 1A–C, Level 1, Hilton Plaza Commercial Centre, No.3–9 Shatin Centre Street, Shatin, New Territories, Hong Kong on Monday, 16 March 2009 at 9:00 a.m..

I/We, (Note a)

of

being the holder(s) of (Note b) Holdings Limited (the “Company”), hereby appoint the Chairman of the Meeting or of

shares of HK$0.001 each in the capital of Core Healthcare Investment

to act as my/our proxy (Note c) at the extraordinary general meeting of the Company to be held at Shop No. 1A–C, Level 1, Hilton Plaza Commercial Centre, No.3–9 Shatin Centre Street, Shatin, New Territories, Hong Kong on Monday, 16 March 2009 at 9:00 a.m. or at any adjournment thereof and to vote on my/our behalf as directed below.

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

	ORDINARY RESOLUTION		FOR	AGAINST	AGAINST	AGAINST
To approve the Proposed CB Modifications (as defined in the circular of the
Company to its shareholders dated 27 February 2009)

Dated the day of 2009. Shareholder’s signature (Notes e to h)

Notes:

• (a) Full name(s) and address 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 (who must be an individual) 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 resolution set out above, please tick (“✓”) the box marked “For” against that resolution. If you wish to vote against the resolution set out above, please tick (“✓”) the box marked “Against” against that resolution. If this form returned is duly signed but without specific direction on the proposed resolution, the proxy will vote or abstain at his discretion in respect of such resolution. A proxy will also be entitled to vote at his discretion on any resolution properly put to the meeting other than that 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 1712-1716, 17th Floor, Hopewell Centre, 183 Queen’s Road East, Hong Kong, not less than 48 hours before the time of the meeting or any adjourned meeting thereof.

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

• For identification purpose only