Finally found a CN where MC BLOODY KILL ON THE SPOT
穿越成青年老天师 我叫张之维,嚣张的张,只手遮天的之,为所欲为的维
www.tongrenquan.org
Under One Person: I, Zhang Zhiwei, the Arrogant Zhang
I traveled through time and space and became a young old Taoist priest.
My name is Zhang Zhiwei, the arrogant Zhang, the Zhi who covers the sky with one hand, and the Wei who does whatever he wants.
Ch15ish
Because the "master" try to educate MC.
At ch10, explain that the realm he is, he must "refine" the heart into a golden core. (not a true bead but figure of speech)
That inside the heart there is "monkey heart" and to "make it round"
Only soon to explain there is a 2nd method. To simply "release it" (follow the heart, but also problematic)