As an argument to cite the evolution of law. Don't quote too much. The old law and the new law should be applied to cases in which the lawsuit occurred before the abolition or invalidation and was not closed. If the old law is beneficial to the offenders, they can be punished according to the old law. If the new law is beneficial to the offenders, it can be handled according to the new law. In short, it can be handled in accordance with the laws favorable to criminals.