The so-called full use of tax advantages means that within the scope permitted by the laws of the host country, through carefully designed investment structure and financing methods, the tax preferential policies of the host government for investment are allocated and utilized to the maximum extent among the project participants, so as to reduce financing costs and improve the solvency of the project. These tax policies vary from country to country and regions, and usually include tax relief provisions for accelerated depreciation, interest costs, investment preferences and other expenses.