These past days, Yang Yizhen truly hadn't felt the presence of any troublesome people around him. In other words, he hadn't detected any dangers at all.
If an assassin had been following him all this time, then it could only mean that the assassin was exceptionally good at hiding.
As the saying goes, "it's easy to dodge an overt spear, but hard to guard against a hidden arrow." Yang Yi was not afraid of someone brandishing a gun and trying to kill him, but an invisible and intangible assassin lurking around was the hardest to defend against.
Aaron had known about the assassin all along but didn't say anything. Now that he did, Yang Yi even had to thank him.
Aaron just smiled, and then he said to Yang Yi, "Do this job well, and try to finish the task quickly, so you can move on to the next one. I'm short-staffed now, short of good hands."
