Automotive 5S refers to the five core functions in the car sales and service model, including vehicle sales (Selling), spare parts sales and promotion (Spare parts), systematic information feedback (Survey), maintenance and repair (Service), and second-hand car transactions (Second-hand). Its advantage lies in expanding the service scope of traditional 4S stores to the field of second-hand car transactions and adding more comprehensive after-sales guarantees. For example, second-hand cars provided by certified 5S stores can enjoy services such as 7-day worry-free return and exchange, original factory extended warranty, and road rescue, which significantly enhances transaction security and customer trust. Although these two 5S concepts have different focuses, they jointly reflect the automotive industry's emphasis on service standardization and customer experience.