1.240 subjects will be randomized 1:1:1 divided into the 3 groups 2.Week0 to Week4,each group were treated with Calcipotriol Betamethasone Ointment 3.Week4 to Week12, the there group were respectively treated with Calcipotriol Betamethasone Ointment,Calcipotriol Ointment and Urea Cream 4.The efficacy and safety were evaluated at the baseline, as well as 1, 4, 8 and 12 weeks after the beginning of treatment.
Evaluate the efficacy and safety of Calcipotriol Betamethasone Ointment and Calcipotriol Ointment in sequential therapy