Bo Yan came from the Bo Family, and for the scions of an aristocratic family, the most important lesson was: interpersonal relationships.
Interpersonal relationships cover how to interact with people in your circle, and also include, how to communicate with your leaders, your collaborators, partners, and how to deal with other parties involved. Of course, it's best to become a leader, learning how to communicate with your team members.
This isn't about unequal personal relationships; quite the contrary, it's a required lesson to ensure that your projects, your studies, and work are completed more smoothly. A successful leader doesn't make you fawn or belittle others, nor does it involve abusing or looking down on team members. On the contrary, you should enable your team members to maximize their initiative while also looking after their interests and creating opportunities for them as well as for yourself.