Song Changsheng was like a child with a new toy, working nonstop for three days and three nights with Little Ninth's help to improve the Qi Refining Introduction.
This so-called improvement was a matter of extracting its essence and discarding the dross.
The problem with this Heart Method was its numerous flaws. The absorption and conversion efficiency of Spiritual Qi was poor, and it lacked explosive power. Only Loose Cultivators would practice it; any Cultivator with a bit of savings would choose a better one.
One would think that with so many flaws, improving it would be easy. But imagination is a beautiful thing, and reality is harsh. Even improving the most basic Dao-Entering Heart Method was an incredibly difficult task.
Often, fixing one problem would create three new ones.
