C591 Divergence drop(part i)

"According to my deductions, the one on Master Xu Yun should be the drug lowering during the Head Subduing Art! Although the drug lowering is the most basic method that all Descending Division s need to learn, I do not have a deep understanding of this method, so I can only use a method to cure the Master Xu Yun, and there may be dangers during the process