Ye Qing's only reliance to kill the short man was the power of the Taoist Sovereign. However, the power of the Taoist Sovereign could not be used by Ye Qing at will, as this power only appeared in extremely critical moments to help Ye Qing avoid danger. Therefore, this power could be said to be sometimes effective and sometimes not.
But the chance to assassinate the short man was certainly only once. So Ye Qing had to make sure the strike was a sure hit, which meant he had to first activate the power of the Taoist Sovereign. Ye Qing didn't know how to activate the power of the Taoist Sovereign; he could only use this method of tapping, using external force to try and see if he could trigger the power of the Taoist Sovereign.
