Weichai Power Co., Ltd. — Proxy Solicitation & Information Statement 2006

Nov 13, 2006

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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 Weichai Power Shareholders’ EGM (as defined below) to be held at 10: 00 a.m. on 29 December 2006

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 at 10: 00 a.m. on 29 December 2006 (the ‘‘Weichai Power Shareholders’ EGM’’) should complete this reply slip[(notes][1][and][6)] .

Name[(note][2)]

Shareholding[(note][3)]

Number of Domestic Shares/ Foreign Shares/H 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 Shares of the Company from 29 November 2006 to 29 December 2006 (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 29 November 2006 are entitled to attend and vote at the Weichai Power Shareholders’ EGM following completion of the registration procedures.

3. The Company has a total issued share capital of RMB330,000,000 divided into 330,000,000 ordinary shares of RMB1.00 each as at 12 November 2006. Your shareholding in the Company shall be calculated according to the total number of ordinary shares of the Company in issue as at 12 November 2006. Please also provide copies of documents that can prove your shareholding.

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

5. Please produce a copy of your identity card (or passport). If a corporate Shareholder’s legal representative or any other person authorized by the board of directors or other governing body of such corporate Shareholder attends Weichai Power Shareholders’ EGM, such legal representative or other person shall produce his proof of identity, and proof of designation as legal representative and/or 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 authorization of that legal representative or other person.

6. In order to be valid, this completed and signed reply slip shall, on or before 20 days before meeting, 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

8. 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