In this article, Zhang Xueming talks about the similarities between the calendar of the Shang Dynasty and the early Mayan calendar.

Although He Yun was not engaged in this research, He Yun still found a lot of loopholes from it.

However, he didn't break it immediately, but continued to look down.

After that, the content is mostly some boring calendar introductions, such as the lunar calendar, the Han calendar, and the various calendar introductions of later dynasties.

In addition to this

"Rebirth 1985 as a Writer" Chapter 663: The Theory of the Calendar! I am hitting it in my hand, please wait a moment,

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