Weichai Power Co., Ltd. is engaged in the manufacture and sale of diesel engines and related parts, automobiles and other major automobile components, minor automobile components and import and export services. It operates in four segments: manufacturing and sale of diesel engines and related parts (Diesel engines); manufacturing and sale of automobiles and major automobile components other than diesel engines (Automobiles and other major automobile components); manufacturing and sale of non-major automobile components (Non-major automobile components), and provision of import and export services (Import & export services). It is also engaged in the production and sale of engine parts and components and other truck parts and components, such as spark plugs, axles, chassis, air-conditioner and compressors. Its subsidiaries include Weichai Power (Weifang) Spare Part Resources Co., Ltd., Weichai Power (Weifang) Oil Co., Ltd. and Weichai Power (Weifang) Intensive Logistics Co., Ltd.