Is there an extra charge for Tmall to keep a car and change tires?

Tmall maintains a car and changes tires at no extra cost. Tire is a round elastic rubber product that rolls on various vehicles or machinery. Tires are usually installed on metal rims, which can support the car body, buffer external shocks, achieve contact with the road surface and ensure the driving performance of the vehicle. Tires are often used in complex and harsh conditions, and bear various deformations, loads, forces and high and low temperatures when driving, so they must have high bearing performance, traction performance and cushioning performance. At the same time, it also requires high wear resistance and bending flexibility, as well as low rolling resistance and heat generation.