Actors under former rules may have to adjust their activities if they want to continue business or other deed when rules change.When past obedience renders them disadvantages,it is unjust for them to shoulder the transitional costs from old to new,especially in the case that the burden should be shared by the society as a whole.The ultimate social justice pursued in new law and the transitional justice,or interim justice called in this thesis,form the core conflicts discussed in this short article.An example is put forward to reflect the seriousness of such conflict,and the solution proposed.As a preliminary inquiry,this article is only intended to clarity the question and tries to identify a possible solution.