UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

OF THE SECURITIES EXCHANGE ACT OF 1934

October 29, 2025

(Commission File No. 1 - 13522)

CHINA YUCHAI INTERNATIONAL LIMITED

(Translation of registrant’s name into English)

16 Raffles Quay #26-00

Hong Leong Building

Singapore 048581

(Address of registrant’s principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F  Form 40-F 

Singapore, Singapore – October 29, 2025 – China Yuchai International Limited (NYSE: CYD) (the “Company”) is reporting that, based on an announcement by the Guangxi Zhuang Autonomous Region authorities on October 28, 2025, Mr. Wu Qiwei is suspected of serious violations of discipline and law and is currently under disciplinary review by the Discipline Inspection Commission of Guangxi Yuchai Machinery Group Company Limited (the other shareholder of the Company’s main operating subsidiary, Guangxi Yuchai Machinery Company Limited (“Yuchai”)) and under investigation by the Yulin Municipal Supervisory Commission.

As announced by the Company on October 28, 2025, Mr. Wu has resigned from his positions as a Director of the Company and Yuchai.

About China Yuchai International

China Yuchai International Limited, through its subsidiary Guangxi Yuchai Machinery Company Limited ("Yuchai"), is one of the leading powertrain solution providers in China. Yuchai specializes in the design, manufacture, assembly, and sale of a wide variety of light-, medium- and heavy-duty engines for trucks, buses, pickups, construction and agricultural equipment, and marine and power generation applications. Yuchai offers a comprehensive portfolio of powertrain solutions, including but not limited to diesel, natural gas, and new energy products such as pure electric, range extenders, and hybrid and fuel cell systems. Through its extensive network of regional sales offices and authorized customer service centers, Yuchai distributes its engines directly to auto OEMs and distributors while providing after-sales services across China and globally. Founded in 1951, Yuchai has established a reputable brand name, built a strong research and development team, and achieved a significant market share in China. Known for its high-quality products and reliable after-sales support, Yuchai has also expanded its footprint into overseas markets. In 2024, Yuchai sold 356,586 engines, further solidifying its position as a leading manufacturer and distributor of engines in China. For more information, please visit http://www.cyilimited.com.

Safe Harbor Statement:

This news release may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The words "believe", "expect", "anticipate", "project", "targets", "optimistic", "confident that", "continue to", "predict", "intend", "aim", "will" or similar expressions are intended to identify forward-looking statements. All statements other than statements of historical fact are statements that may be deemed forward-looking statements. These forward-looking statements, including, but not limited to, statements concerning China Yuchai's and the joint ventures’ operations, financial performance and condition, are based on current expectations, beliefs and assumptions which are subject to change at any time. China Yuchai cautions that these statements by their nature involve risks and uncertainties, and actual results may differ materially depending on a variety of important factors such as government and stock exchange regulations, competition, political, economic and social conditions around the world and in China, including those discussed in China Yuchai's Form 20-Fs under

the headings "Risk Factors", "Results of Operations" and "Business Overview" and other reports filed with the Securities and Exchange Commission from time to time. All forward-looking statements are applicable only as of the date they are made and China Yuchai specifically disclaims any obligation to maintain or update the forward-looking information, whether of the nature contained in this release or otherwise, in the future.

For more information:

Investor Relations

Kevin Theiss

Tel: +1-212-510-8922

Email: cyd@bluefocus.com

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereto duly authorized.


China Yuchai International Limited
(Registrant)

By:	/s/ Weng Ming Hoh
Name:	Weng Ming Hoh
Title:	President and Director

Date: October 29, 2025

CHINA YUCHAI INTERNATIONAL LTD 6-K