Tian Zige pasted on the blackboard is called Tian Zige Blackboard Sticker, which has certain magnetism. Taobao, Tmall, JD.COM and Amazon all have sales, which can be used for hard-pen calligraphy teaching.
Tian Zige is a template for standardizing the writing format of Chinese characters, which is composed of four borders, horizontal midline and vertical midline, which can lay a solid foundation for writing Chinese characters.