When did the myth and legend of Pangu's opening the sky begin, and when did modern times begin to pay attention to it?

Legend has it that at the beginning of the universe, there was no heaven and earth, and the whole universe was closed and dark everywhere. One day, Pangu woke up from a deep sleep, unable to see anything and depressed. He picked up an axe and split the universe. The universe is divided into two parts, half heaven and half earth. After the separation of heaven and earth, Pangu was afraid of their reunion, so he supported the sky with his hands and kept his feet on the ground, and the sky gradually floated up, and Pangu grew taller and taller. Until one day, the distance between heaven and earth is so far away that their position is fixed and cannot be changed. Pangu also collapsed, and qi became everything in the world.

The myths and legends of Pangu Tiankai were handed down orally before the Three Kingdoms period. It was not until the Three Kingdoms period that a scholar named Wu recorded this legend in Thirty-five Calendars, which was the earliest written record of Pangu legend. However, in the history books of our country, there is no clear record of the time and place of the legend of Pangu Kaitian. At that time, there was a Pangu Mountain, and the myths and legends about Pangu should have been circulated from here. It was earlier than the Qin and Han Dynasties, and the specific time has been impossible to verify.

After the Three Kingdoms, the legend of Pangu's opening heaven gradually became popular. Later, the legend of Pangu's creation was expressed in different dynasties and recorded in many ancient books. In modern society, we can also find many Pangu relics left by our ancestors. With the development of science, people have been exploring the origin of the universe, and the legend of Pangu's creation is the earliest origin of the universe.

Pangu's pioneering spirit is necessary for our past reforms. Pangu's spirit of not being afraid of difficulties, facing difficulties, creating everything with labor, sacrificing the ego and achieving the big ego is still worth learning and carrying forward. ?