Xinyang Audi 4s must buy a car for six years or 12km for maintenance, which is illegal. Because Audi's official statement is that the maintenance interval is every 10000 km or 12 months (whichever comes first). The maintenance business is chosen by consumers themselves. Xinyang Audi 4s must buy a car for six years or 12 km for maintenance, which is compulsory and illegal, and consumers can refuse.