Clinical Study of Fangbai Granule on Reducing Recurrence of Vitiligo

INTERVENTION: Chinese traditional medicine group:Taking Chinese traditional medicine, every week 2 agent, the interval of treatment, for si Xconsecutive months, observed after discontinuation of si Xmonths.;The placebo group:A placebo, a week 2 agent, the interval of treatment, for si Xconsecutive months, observed after discontinuation of si Xmonths.; CONDITION: Vitiligo PRIMARY OUTCOME: White spot activity score (VIDA);White spot area;White spot color score (VASI); SECONDARY OUTCOME: The quality of life score (DLQI); INCLUSION CRITERIA: (1)18 years old = age =65 years old ; (2) The stability of non segmental vitiligo patients with vitiligo in plateau (2021 edition) in diagnosis and treatment of vitiligo consensus: ?VIDA to 0 points;?clinical features: a white spot in porcelain white, edge clear or pigmentation.?no isomorphic response (1 year) or higher;?Wood lamp: skin color is white, the boundary is clear, Wood light skin area or less visual area;Non segmental vitiligo vitiligo (reference 2012 global consensus conference) : including the distributing type, hair, face acromegaly and mucous membrane.Distributing type refers to the white spot 2 pieces or more, covers an area of 1 3 level;Pan hair is white spot size 4 (> 50%);Surface acromegaly type refers to the white spot is mainly limited to the head, limbs, especially in remote and facial toes around the mouth cavity, can for the development of distributed type, hair style;Mucous membrane type refers to the white spot in two or more mucous m