When a passenger car is moving, the engine’s operation and horsepower are crucial, as they are directly related to safety, efficiency, and comfort. In addition to the basic power transmission, the transmission system of a passenger car needs to have several necessary functions and features, such as smooth gear shifting, improved fuel efficiency, adaptability to different road surfaces, durability, reliability, and driving safety. Especially the vehicle should be steered smoothly when cornering, without shaking and squealing. The automotive driveshaft assembly, CV joint and other transmission system parts produced by Shing Shing Long are durable and reliable high-precision parts ensuring that passenger vehicles can adapt to different driving situations and provide good transmission performance and safety.