为贯彻科技兴国战略方针，促进产业产品结构调整，最近国家有关部门相继出台多项税收优惠政策。在诸多优惠政策中应根据不同企业不同的经营状况，不同地区，不同税率有选择地用好用定国家税收优惠政策，使投入的资益能够得到最佳的回报率。为鼓励企业对内投资，进行技术改造， In order to implement the strategy of rejuvenating the country through science and technology and the adjustment of industrial product structure, a number of tax incentives have been promulgated recently by the relevant state departments. In many preferential policies, we should make the best use of preferential taxation policies according to different business conditions, different regions and different tax rates of different enterprises, so that the best return on investment can be obtained. In order to encourage enterprises to invest in China and carry out technological transformation,