Yu Ziqing stayed in Dadui for a few days without any major events, then quietly went to the Dadui Book Library to find a few books related to the Mathematics Classics, and then quietly left.
He didn't return to Jinlan Mountain, but instead cultivated in secret at the Health Club, as it was convenient to receive information there.
The Dayan Preface cultivation officially began; the first and second levels were easy for him, but starting from the third level, the difficulty increased sharply.
He temporarily stopped practicing the Dayan Preface and continued to study the Zhou Yi arithmetic, along with several other similar explanations and scriptures.
The effect of drawing parallels was excellent, and the progress in the third realm of the Dayan Preface was still quite smooth.
The first three realms, apart from having the effect of refining the Yin God, were completely useless, and the effect was not even good.
