What historical phenomenon does the national accomplishment reflect?

It reflects the transformation of primitive residents in China from gathering and hunting to farming.

From the Eastern Han Ban Gu's White Tiger Biography, the original text is:

In ancient times, people ate animals and animals. As for Shennong, there are many people and not enough livestock. Shennong makes things at the right time and teaches people to farm.

Translation:

In ancient times, people hunted animals and birds to eat, but in Shennong era, the population grew more and more, and the speed of hunting animals and birds could not keep up with the speed of population growth. At this time, Shennong took advantage of the change of weather and the fertility of the earth, and then made primitive tools for cultivated land, giving it the ability to cultivate.

Extended data:

White Tiger Yi Tong has certain academic value.

White Tiger Yi Tong has had a great influence since its publication. Because it was appointed by the emperor himself, its content was all-encompassing, and it stipulated people's code of conduct in politics, ideology and morality. Yi Tong, the White Tiger, used Yin-Yang and Five Elements to generalize and specifically explain everything in the world, such as "Three Cardinals and Five Permanences".

Young people, such as weddings, funerals and daily life phenomena, can be explained by the theory of Yin-Yang and Five Elements. No matter how far-fetched and absurd, the speaker is eloquent and the listener is convinced, which makes the Yin-Yang and Five Elements become the universal "golden key" for people to understand and explain the world, and become a thinking mode and formula, which is undoubtedly the fatal shackles of academic renewal and ideological emancipation.

"White Tiger Yi Tong" combines modern Confucian classics, ancient China Confucian classics and prophetic superstition, trying to unify Confucian classics, establish theological Confucian classics and regard them as eternal truths, requiring people to follow it from generation to generation, and recite it without doubt and criticism;

This is just a wishful dream of the ruler. The facts of historical development tell us that once the Confucian classics develop into theology, their vitality will almost be exhausted, which is the inspiration given to us by Yi Tong. In this sense, White Tiger Yi Tong declared the decline of Confucian Classics, marking the decline of Confucian Classics.