"Xia Ao, you have deeply disappointed me." Gui Xingfu once again said, "I've already told you to seize the opportunity, why didn't you seize it at the last moment?"
The last opportunity Gui Xingfu referred to was the moment after Zhi Li's defeat when Ling Ao should have immediately attacked Zhi Li, seized the opportunity to kill him, and thereby defect to Suo Lun.
Did Ling Ao have the opportunity?
On the battlefield of Tianshui City, there was absolutely no opportunity, but on the run, there was a definite possibility.
At that time, Zhi Li was completely dejected and always drunkenly intoxicated.
Moreover, Li Chenglian was extremely busy at the time, dealing with many matters, and every day there was a brief period when she would be away from Zhi Li's side while Ling Ao, as a servant, spent half of his time each day by Zhi Li's side.
Of course, once he made a move to kill Zhi Li, it would also be almost certainly a suicide mission.