The role is to promote the construction of work style. According to relevant public information, "three comparisons" is not only a method and means to promote regional development, but also a standard measure to measure work performance. Three ratios are the ratio of the past and the present, the ratio inside and outside the county, and the ratio of backwardness and advancement. The three questions are what cadres should learn, what they should do now and what they should leave for future generations.