Prompt:

The flat vector background, features hot air balloons, gifts, and shopping carts floating in the sky above an open market stall on white paper with colored lines. , The flat illustration style emphasizes clean shapes and minimalism. , It is simple yet visually appealing for advertising design. --v 6.1 --ar 3:4

平面向量背景，特征热气球、礼物和漂浮在天空中的购物车，位于开放市场摊位上，背景为白纸和彩色线条。平面插图风格强调干净的形状和极简主义。它简约而又视觉上吸引人，适合广告设计。