The Teahouse

It did not matter that whether Slave Huan wanted to kill Master Yu or whether it was the other way around. The important question was not about how to carry out the killing, it was how to avoid Shangguan Ru's suspicions. The two of them had sworn an oath in the presence of the Tenth Young Master to never fight again. Both had kept their word superficially over a long period of time - no one wished for it to end with losses on both sides.

Gu Shenwei had always remembered the words of his Master Shifu Tie Hanfeng - if you wished to 'safely kill somebody', then before you kill that person you have to cut off the target's 'relationships'. Another way of looking at this statement was that if you could not cut off the target's 'relationships', then you had to remove 'suspicions' related to yourself, to not let anyone have any doubts about you.