Because it looks like Tian Zi, it is called Tian Zi's case.
a square box, in which two lines are crossed, forms the Tian Zige. It was born in the literacy movement in the early days of liberation, and its inventor is unknown. In that era of advocating horizontal and vertical, as long as the words were written correctly, it helped many people get rid of the "illiterate" hat.
Up to now, Tian Zige has a history of more than 5 years, which occupies a sacred and inviolable position in Chinese teaching and even in the field of Chinese writing.
Tian Zige is a template for standardizing the writing format of Chinese characters, which includes four borders, a horizontal center line and a vertical center line. It is a standard for beginners to write in primary schools. When learning Chinese characters, it is necessary to gradually standardize Chinese characters in Tian Zige, which can lay a solid foundation for future Chinese learning.
Extended information:
Tian Zige includes four borders, a horizontal centerline and a vertical centerline. The four grids are called upper left grid, lower left grid, upper right grid and lower right grid.
Eight-line Mi Zige is a way of marking in calligraphy practice, which consists of a square outer frame, two broken lines in the horizontal and vertical directions, two broken lines in the diagonal direction, four broken lines in the square inscribed with the outer frame and eight broken lines in * * *.
The most practical feature of line segment Mi Zige is that each dashed line is divided into eight real line segments, and the lengths of blank parts between these eight real line segments and between them and the real line segments are equal, hence the name of the eight-line segment Mi Zige.
Mi Zige is mostly used for copying, which helps to arrange the positions of shelves and strokes. Mi Zige is also a tool for some primary and middle school students to practice calligraphy, and there are even calligraphy classes in Mi Zige. In the process of use, we should learn to use it flexibly, and Mi Zige with eight equidistant line segments will make the positioning more accurate.