"When SAIC Volkswagen was designing and developing a new generation of smart Internet of Vehicles (IoV) systems, we researched many architectures from popular, new IoV systems both at home and abroad. EMQX messaging middleware, based on the MQTT protocol, provides high concurrency, low latency and high throughput, which makes it very suitable for our IoV use cases. It enables loose coupling of IoV systems and vehicle operating systems, simplifying the interaction between the two. This allows our team to focus on the development of high-level IoV applications. At the same time, EMQX also has good functional scalability and horizontal expansion capabilities for managing capacity. It provides a strong guarantee of support for the coming large-scale demand of new cars and other models."