they are the definite items stipulated by the law, such as the transportation, construction, finance , insurance and the like .they do not include the processing, repairs, and replacement services, for they are subject to the value added tax.
税法有明确的规定。比如交通运输、建筑安装、金融保险等。不包括加工、修理、修配业务,因为它们要缴增值税。