It is best to use Song style and regular script for library cards. The width and height of Song style characters are basically the same, which makes the font feel more square and there is a strong dependence between regular script characters.

External formal features of fonts and characters. It is the style of words, and it is the coat of words. The artistry of fonts is reflected in its perfect external form and rich connotation. Font is the carrier of culture and the epitome of society.