What are the origins of the Ten-Day Campaign and the Twelve-Day Campaign?

In his book "The Origin of Astronomy in China", Zheng believes that the myth of "Ten Days Born" originated from the ancient river in China, which is the embodiment of the concept of decimal chronology and should have originated from the fishing and hunting era of primitive society.

The "Twelve Earthly Branches" evolved from the myth that "there are two births in October" before the Yin and Shang Dynasties, and then gradually evolved into twelve Chen. Therefore, Zheng concluded: "Twelve Poems is probably the creation of Xia people."

Chen Zungui pointed out in the History of Astronomical Literature in China that "there may have been a branch in the Xia Dynasty more than 4,000 years ago". Du Shiran and others argued in the book History of Science and Technology in China that there was a ten-day dry calendar in Xia Dynasty, and the Shang Dynasty further used the dry calendar in Xia Dynasty, thus combining the ten-day dry calendar with the twelve earthly branches to form a sixty-week calendar.

Extended data:

Ten words, such as A, B, C and D, appeared in the Shang Dynasty, which were called Tiangan, and were used in combination with earthly branches (such as Jiazi and E Yuan) to express the year, month, day and time.

From the discovery of Oracle Bone Inscriptions in Shang Dynasty, more than 99% of the contents are related to divination, which is what we often call "Oracle Bone Inscriptions", but Oracle Bone Inscriptions is not the whole content of Oracle Bone Inscriptions. In addition, there are a few but very important other kinds of inscriptions that have nothing to do with divination.

For example, the inscription "List of Branches and Branches" in it. The inscription of "the surface of the liver" is a special inscription in Oracle Bone Inscriptions, belonging to the epigraph inscription.

This inscription is a list of 60 branches named ten heavenly stems: A, B, C, D, E, Ji, G, Xin, Ren, Gui and twelve branches: Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai.

Refer to Baidu Encyclopedia-heavenly stems and earthly branches