When Liang Sheng entered his Lecturer's Cave Residence, he carefully set up the Concealment Formation again before taking out the jade slip he had copied.
He didn't immediately look at the copied ancient techniques but first browsed through some ancient miscellaneous records, which were indeed somewhat similar to the accounts told by the Outer Sect Alchemists.
However, due to the different perspectives of the narrators and the focus of the content, Liang Sheng still found it interesting to read, even though the overall story framework was largely similar.
It is impossible to estimate how many years have passed since the ancient Cultivation World, but after the Great Heavenly Change, it has become completely separated from the current Cultivation World because the path of cultivation has become completely different now.