Tax incentives refer to the government's use of multiple means in the tax system design and tax collection and management process, through the adjustment of tax burdens, to induce behavior choices of microeconomic entities, to encourage taxpayers to occur or not occur, to participate or not to participate in certain economic behaviors, To achieve the strategic goal of coordinated socio-economic development of the government. According to the above definitions, Which of the following are not tax incentives: (). ['During the product development stage, the equipment cost is high, at this time, the tax deduction for accelerated depreciation is provided.', 'Tax concessions for taxpayers who have suffered severe natural disasters such as wind, fire, water, and earthquakes.', 'In the middle stage of the product, the demand for funds is strong, and at this time, tax credits are provided for investment credits.', 'The risk of the company is still large during the product trial stage, at this time, tax incentives for loss carry forward.']