Weichai Power Co., Ltd. — Proxy Solicitation & Information Statement 2008

Sep 17, 2008

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濰 柴 動力 股 份 有 限 公 司 WEICHAI POWER CO., LTD.

(a joint stock limited company incorporated in the People’s Republic of China with limited liability)

(Stock Code: 2338)

Reply Slip in respect of the Extraordinary General Meeting of the Shareholders of the Company to be held on 3 November 2008

Pursuant to its Articles of Association, the Company Law of the People’s Republic of China (the ‘‘PRC’’) and the relevant regulations, all shareholders of Weichai Power Co., Ltd. (the ‘‘Company’’) who wish to attend the extraordinary general meeting of the Company to be held on 3 November 2008 (the ‘‘EGM’’) should complete this reply slip[(notes][1][&][6)] :

Name[(note][2)] Shareholding[(note][3)] Number of H Shares/A Shares[(note][4)]

I.D./Passport No.[(note][5)] :

Telephone No.:

Address

Date:

Signature of Shareholder:

Notes:

1. Please fill in this reply slip in BLOCK CAPITALS.

2. The Company will not process registration of transfers of H Shares of the Company from 4 October 2008 to 3 November 2008 (both days inclusive). Holders of H Shares of the Company whose names appear on the register of H Shares of the Company kept at Computershare Hong Kong Investor Services Limited at the close of business on 3 October 2008 are entitled to attend and vote at the EGM following completion of the registration procedures. The above requirement does not apply to holders of A Shares of the Company.

3. The Company had a total issued share capital of RMB520,653,552 divided into 520,653,552 ordinary shares (comprising 126,500,000 H Shares and 394,153,552 A Shares) of RMB1.00 each as at 12 September 2008. Your shareholding in the Company shall be calculated according to the total number of ordinary shares of the Company in issue as at 12 September 2008. Please also provide copies of documents that can prove your shareholding.

4. Please indicate clearly the number of H Shares and/or A Shares of the Company registered in your name(s).

5. Please produce copies of your identity cards (or passports). If a corporate shareholder’s legal representative or any other person authorised by the board of directors or other governing body of such corporate shareholder attends the EGM, such legal representative or other person shall produce his proof of identity, and proof of designation as legal representative and the valid resolution or authorisation document of the board of directors or other governing body of such corporate shareholder (as the case may be) to prove the identity and authorisation of that legal representative or other person.

6. In order to be valid, this completed and signed reply slip shall, on or before 14 October 2008, be delivered by hand, by facsimile or by post to the Secretary to the Board of the Company. The contact details of the Secretary to the Board of the Company are as follows: Weichai Power Co., Ltd.

7. Securities Department 197, Section A

Fu Shou East Street

High Technology Industrial Development Zone Weifang Shandong Province The People’s Republic of China Postal Code: 261061 Telephone No.: 86 (536) 2297068 Facsimile No.: 86 (536) 8197073