中文摘要：

文章以2007年的两税合并为背景，研究上市公司出于税收筹划的目的如何选择盈余管理方式。研究发现，税率下降公司由于税率下降幅度较大，税收筹划收益较高，因此进行了显著向下的应计盈余管理，而没有选择真实盈余管理方式；而税率上升公司则由于存在5年的过渡期，税收筹划收益较低，因此既没有进行显著的应计盈余管理，也没有进行显著的真实盈余管理。这意味着上市公司在进行税收筹划时会综合权衡各种避税方式的成本收益，进而选择最合适的避税方式。政府部门在制定税收政策时必须预先考虑企业可能的税收筹划策略，以达到预期的政策效果。

英文摘要：

This paper studies listed companies＇ choice of earnings management methods for the purpose of tax planning in the context of the unification of the tax rates for foreign and domestic enterprises in 2007. The results show as follows： owing to the decrease in income tax rate by a big margin and the higher tax planning profits, companies with the decrease in income tax rate take significant accrual-based earnings management, but do not get involved in real earnings management; owing to the existence of a five-year period of transition and lower tax planning profits, companies with the increase in income tax rate do not take significant accrual-based and real earnings management, It means that when doing tax planning, listed companies make a trade-off between costs and profits of tax shelters to choose the most suitable tax shelter. Therefore, when formulating a tax policy, government departments must take enterprises＇ possible tax planning strategy into account in order to realize the prospective policy purpose.