Zhang Yong's first lesson for Yang Yi was to teach him respect for life, to think carefully before acting about whether it was necessary to do so.
Yang Yi remembered this because he had already realized that he indeed seemed to be naturally lacking in respect for life and in awe of rules.
For an ordinary person to take a knife and kill someone, the vast majority of people, even if they had a great hatred, would really find it difficult to carry through with it, and after killing someone, they wouldn't be as calm as Yang Yi.
Yang Yi didn't know why Zhang Yong wanted to teach him this, but he felt that Zhang Yong must have had a good reason for doing so.
"I remember what you said, but can you tell me why it has to be this way? I'm the kind of person who likes to get to the bottom of things."