Horizontal writing: corresponding to the current habit of reading horizontally from left to right. In modern life and work, most signatures are written horizontally, such as check signature, document signature, contract signature and so on.

Vertical writing: corresponding to the ancient habit of reading vertically from right to left. In the customs and traditions of life, when signing, most of them are written vertically, such as paintings and calligraphy works, red envelopes and so on.