Do ancient poems use vertical writing format to write punctuation marks?

Ancient poems are generally written vertically, without punctuation. In the creation of ancient poetry, the form of vertical writing is called "vertical arrangement", which aims to be beautiful and reduce space occupation. The rhythm and rhythm of ancient poetry can often be expressed by the arrangement of words and vocabulary, without punctuation marks to prompt and separate them. Therefore, in the vertical arrangement of ancient poems, punctuation marks are generally not used to mark the relationship between sentences or phrases. On the contrary, the author often expresses the meaning with the help of the change of font and meaning, and the reader needs to understand the meaning of the poem through the understanding of the whole meaning.