Xia Zheng Xiao is the earliest ancient book that records farming in the existing history of China. It was recorded in Dadai Li Ji, and later it became a separate book from Dadai Li Ji. Due to the long time interval, the author of this book can't verify it. Some people say that it was written by Confucius and his disciples during the Warring States period, and some studies show that this book existed in the Xia Dynasty. Summer has a long history. At that time, there was no concept of four seasons. There are only ten months in a year, and each month has 36 days. The month is determined by the direction of the handle of the Big Dipper. There are still a few people who still use this calendar to live. Does Xia use other stars? Look at the sky? .
Xia Dynasty was the first dynasty in China, and the legend about Dayu's water control was in Xia Dynasty. However, various studies now show that the Xia Dynasty may be a non-existent dynasty, and no cultural relics about the Xia Dynasty have been unearthed at present, so whether Xia Zheng Xiao was written in the Xia Dynasty is of great significance.
Other dynasties have cultural relics as evidence, but the Xia Dynasty can't be comprehensively expounded from any historical materials and classics, and there are many fairy tales in the Xia Dynasty, which adds a layer of mystery, making people more and more doubt whether the Xia Dynasty really exists. The Shang Dynasty, the closest to Xia, did not find any records about Xia in Oracle Bone Inscriptions, and it was the earliest in the Zhou Dynasty. However, due to the zero records of Shang Dynasty, the records of Zhou Dynasty became unreliable.
So Xia became the hope to prove the Xia Dynasty. Some scholars think that there may be a relationship between the Zhou Dynasty and the Xia Dynasty, because the Zhou Dynasty used? New summer calendar? From summer to? Ancient summer calendar? Whether there is a record of Xia Zhengxiao in Xia is still uncertain and remains to be verified.