<qa>  What is the total amount of the placebo washout with placebo?1.PANSS total of no less than 60 2.3-7days washout with placebo is required after discontinuation of other oral antipsychotics; No washout is needed for patients who had never taken any antipsychotics before; In cases that patientss condition is deemed clinically deteriorating and immediate treatment is needed, patients with less than 3 days placebo washout could be randomized after notifying the sponsor 3.No serious function impairment in heart, liver or kidney. 