Spring background, Colorful butterflies set wreath with green mint leaves, watercolor. Round banner for text. spring summer card design on white background. Vector 春天的背景，五颜六色的蝴蝶设置花圈与绿色薄荷叶，水彩。文本的圆形横幅。白色背景的春夏卡设计。矢量插图