CYD [CHINA YUCHAI INTERNATIONAL] SC 13D/A: JOINT FILING AGREEMENT We, the signatories of this
[JOINT FILING AGREEMENT We, the signatories of this Statement on Schedule 13D to which this Agreement is attached, hereby agree that such Statement is, and any amendments thereto filed by any of us will be, filed on behalf of each of us. Dated: August 30, 2010 HONG LEONG ASIA LTD. Name : Kwek Leng Peck Title : Director HL TECHNOLOGY]