yellow and black diagonal stripe pattern background, high-contrast diagonal hazard stripe graphic, rectangular warning sign - 限制空間 幅插畫檔、美工圖案、卡通及圖標危險, 警告標誌 - 符號, 建築業
school education concept in cartoon style. stylish school background made of colorful paper, denim notebook, checkered notebook sheet. creative banner or template. - 限制空間 幅插畫檔、美工圖案、卡通及圖標重返校園, 筆記本, 海報