Within 30 days of the receipt , if the trucks exist any quality problem, free maintenance will be provided, do not need to bear any freight.Within 30 days-1 year of the receipt, if the trucks exist any quality problem, free maintenance will be provided, need to bear half of the freight.After1 year of the receipt, if the trucks exist any quality problem, need to pay for the maintenance as well as all the freight, which will be quoted in depends. Within 30 days of the receipt , if the trucks exist any quality problem, free maintenance will be provided, do not need to bear any freight.Within 30 days-1 year of the receipt, if the trucks exist any quality problem, free maintenance will be provided, need to bear half of the freight.After1 year of the receipt, if the trucks exist any quality problem, need to pay for the maintenance as well as all the freight, which will be quoted in depends.