H0: Difference of excellent and good rate between the trial and control groups (πT-πC) ≤ -δ H1: Difference of excellent and good rate between the trial and control groups (πT-πC) > -δ Cochran-Mantel-Haenszel test will be considered to compare the difference of excellent and good rate between the trial and control groups and to calculate the lower limit of 95%CI on one side. The lower limit greater than -10.0% will be considered as non-inferiority.