Notes:

A servant of Xu Chu once asked why wouldn't he talk with Cao Ren, Cao Cao's cousin. Xu Chu replied "He may be a close relative and important subject of the King, but he's in charge of external defences at the borders. I, Xu Chu, am in charge of internal security. If he wanted to chat with me, we could do so in public. Why did he ask to chat with me in private?"