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In page Punctuation:

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Punctuation marks, especially spacing, were not needed in logographic or syllabic (such as Chinese and Mayan script) texts because disambiguation and emphasis could be communicated by employing a separate written form distinct from the spoken form of the language.[citation needed] Ancient Chinese classical texts were transmitted without punctuation. However, many Warring States period bamboo texts contain the symbols ⟨└⟩ and ⟨▄⟩ indicating the end of a chapter and full stop, respectively.[1] By the Song dynasty, the addition of punctuation to texts by scholars to aid comprehension became common.[2]