The vehicle is divided into two parts: the engine and the chassis structure. This course refers to the chassis construction. The course introduces the structure, principles and working processes of the major systems that make up the car. The systems involved in the course are transmission systems, travel systems, steering systems, braking systems and body, instrumentation, lighting and ancillary devices. The course takes the modern car as the learning object, analyzes the representative models, makes the students fully understand the theoretical knowledge of the car structure, understands how these theoretical knowledge and technology are applied in the modern automobile design, manufacture and application process; understand the automotive technology is comprehensive; understand the development trend of automotive technology; understand the history and status of the world's major automotive industry systems. It also provides a basis for further study of the various courses related to automotive technology.