The punctuation seems extraneous to me. They all come either before or after keywords so they don't seem to be needed to parse the script. IIRC it's very similar to actual Classical Chinese, which relied on words like 曰、乃、也 to indicate when a clause or sentence starts or ends. IIRC typically the punctuation was added as a part of the excercise of reading.[0]

[0] https://zh.m.wikipedia.org/zh-hant/%E5%8F%A5%E8%AE%80