When the confidence level is 5%, the five variables of absolute and relative distortion of factor price and the original sequence of variables Investment, which measure overinvestment, are unstable, but the first order difference of these variables does not exist unit root, that is, all of them are single whole I (1) processes of the first order, and the ADF test results of the variables Export, which measure consumption deficiency and excessive export, are stationary processes, so they meet the conditions for establishing VAR model.